/*
- * Copyright (c) 1998-2007 Apple Inc. All rights reserved.
+ * Copyright (c) 1998-2016 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
-/*
- * Copyright (c) 1998 Apple Computer, Inc. All rights reserved.
- *
- * HISTORY
- *
- */
-// 45678901234567890123456789012345678901234567890123456789012345678901234567890
+
+
#include <sys/cdefs.h>
#include <IOKit/assert.h>
#include <IOKit/IOLib.h>
#include <IOKit/IOMemoryDescriptor.h>
#include <IOKit/IOMapper.h>
+#include <IOKit/IODMACommand.h>
#include <IOKit/IOKitKeysPrivate.h>
+#include <IOKit/IOSubMemoryDescriptor.h>
+#include <IOKit/IOMultiMemoryDescriptor.h>
+
#include <IOKit/IOKitDebug.h>
#include <libkern/OSDebug.h>
#include "IOKitKernelInternal.h"
-#include "IOCopyMapper.h"
#include <libkern/c++/OSContainers.h>
#include <libkern/c++/OSDictionary.h>
#include <libkern/c++/OSArray.h>
#include <libkern/c++/OSSymbol.h>
#include <libkern/c++/OSNumber.h>
+#include <os/overflow.h>
#include <sys/uio.h>
#include <vm/vm_protos.h>
extern ppnum_t pmap_find_phys(pmap_t pmap, addr64_t va);
-void ipc_port_release_send(ipc_port_t port);
-
-/* Copy between a physical page and a virtual address in the given vm_map */
-kern_return_t copypv(addr64_t source, addr64_t sink, unsigned int size, int which);
-
-memory_object_t
-device_pager_setup(
- memory_object_t pager,
- int device_handle,
- vm_size_t size,
- int flags);
-void
-device_pager_deallocate(
- memory_object_t);
-kern_return_t
-device_pager_populate_object(
- memory_object_t pager,
- vm_object_offset_t offset,
- ppnum_t phys_addr,
- vm_size_t size);
-kern_return_t
-memory_object_iopl_request(
- ipc_port_t port,
- memory_object_offset_t offset,
- vm_size_t *upl_size,
- upl_t *upl_ptr,
- upl_page_info_array_t user_page_list,
- unsigned int *page_list_count,
- int *flags);
+extern void ipc_port_release_send(ipc_port_t port);
+// osfmk/device/iokit_rpc.c
+unsigned int IODefaultCacheBits(addr64_t pa);
unsigned int IOTranslateCacheBits(struct phys_entry *pp);
__END_DECLS
-#define kIOMaximumMappedIOByteCount (512*1024*1024)
+#define kIOMapperWaitSystem ((IOMapper *) 1)
static IOMapper * gIOSystemMapper = NULL;
-IOCopyMapper * gIOCopyMapper = NULL;
-
-static ppnum_t gIOMaximumMappedIOPageCount = atop_32(kIOMaximumMappedIOByteCount);
-
ppnum_t gIOLastPage;
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#define DEBG(fmt, args...) {}
#endif
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-
-class _IOMemoryMap : public IOMemoryMap
-{
- OSDeclareDefaultStructors(_IOMemoryMap)
-public:
- IOMemoryDescriptor * fMemory;
- IOMemoryMap * fSuperMap;
- mach_vm_size_t fOffset;
- mach_vm_address_t fAddress;
- mach_vm_size_t fLength;
- task_t fAddressTask;
- vm_map_t fAddressMap;
- IOOptionBits fOptions;
- upl_t fRedirUPL;
- ipc_port_t fRedirEntry;
- IOMemoryDescriptor * fOwner;
-
-protected:
- virtual void taggedRelease(const void *tag = 0) const;
- virtual void free();
-
-public:
-
- // IOMemoryMap methods
- virtual IOVirtualAddress getVirtualAddress();
- virtual IOByteCount getLength();
- virtual task_t getAddressTask();
- virtual mach_vm_address_t getAddress();
- virtual mach_vm_size_t getSize();
- virtual IOMemoryDescriptor * getMemoryDescriptor();
- virtual IOOptionBits getMapOptions();
-
- virtual IOReturn unmap();
- virtual void taskDied();
-
- virtual IOReturn redirect(IOMemoryDescriptor * newBackingMemory,
- IOOptionBits options,
- IOByteCount offset = 0);
-
- virtual IOReturn redirect(IOMemoryDescriptor * newBackingMemory,
- IOOptionBits options,
- mach_vm_size_t offset = 0);
-
- virtual IOPhysicalAddress getPhysicalSegment(IOByteCount offset,
- IOByteCount * length);
-
- // for IOMemoryDescriptor use
- _IOMemoryMap * copyCompatible( _IOMemoryMap * newMapping );
-
- bool init(
- task_t intoTask,
- mach_vm_address_t toAddress,
- IOOptionBits options,
- mach_vm_size_t offset,
- mach_vm_size_t length );
-
- bool setMemoryDescriptor(IOMemoryDescriptor * _memory, mach_vm_size_t _offset);
-
- IOReturn redirect(
- task_t intoTask, bool redirect );
-};
+#define IOMD_DEBUG_DMAACTIVE 1
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
kIOPLExternUPL = 0x00000002,
};
-struct typePersMDData
+struct IOMDPersistentInitData
{
- const IOGeneralMemoryDescriptor *fMD;
- ipc_port_t fMemEntry;
+ const IOGeneralMemoryDescriptor * fMD;
+ IOMemoryReference * fMemRef;
};
struct ioPLBlock {
upl_t fIOPL;
- vm_address_t fIOMDOffset; // The offset of this iopl in descriptor
- vm_offset_t fPageInfo; // Pointer to page list or index into it
- ppnum_t fMappedBase; // Page number of first page in this iopl
- unsigned int fPageOffset; // Offset within first page of iopl
- unsigned int fFlags; // Flags
+ vm_address_t fPageInfo; // Pointer to page list or index into it
+ uint32_t fIOMDOffset; // The offset of this iopl in descriptor
+ ppnum_t fMappedPage; // Page number of first page in this iopl
+ unsigned int fPageOffset; // Offset within first page of iopl
+ unsigned int fFlags; // Flags
};
-struct ioGMDData {
- IOMapper *fMapper;
- unsigned int fPageCnt;
- upl_page_info_t fPageList[];
- ioPLBlock fBlocks[];
+enum { kMaxWireTags = 6 };
+
+struct ioGMDData
+{
+ IOMapper * fMapper;
+ uint64_t fDMAMapAlignment;
+ uint64_t fMappedBase;
+ uint64_t fMappedLength;
+ uint64_t fPreparationID;
+#if IOTRACKING
+ IOTracking fWireTracking;
+ struct vm_tag_set fWireTags;
+ struct vm_tag_set_entry fWireTagsEntries[kMaxWireTags];
+#endif /* IOTRACKING */
+ unsigned int fPageCnt;
+ uint8_t fDMAMapNumAddressBits;
+ vm_tag_t fAllocTag;
+ unsigned char fDiscontig:1;
+ unsigned char fCompletionError:1;
+ unsigned char _resv:6;
+
+ /* variable length arrays */
+ upl_page_info_t fPageList[1]
+#if __LP64__
+ // align fPageList as for ioPLBlock
+ __attribute__((aligned(sizeof(upl_t))))
+#endif
+ ;
+ ioPLBlock fBlocks[1];
};
#define getDataP(osd) ((ioGMDData *) (osd)->getBytesNoCopy())
-#define getIOPLList(d) ((ioPLBlock *) &(d->fPageList[d->fPageCnt]))
+#define getIOPLList(d) ((ioPLBlock *) (void *)&(d->fPageList[d->fPageCnt]))
#define getNumIOPL(osd, d) \
(((osd)->getLength() - ((char *) getIOPLList(d) - (char *) d)) / sizeof(ioPLBlock))
#define getPageList(d) (&(d->fPageList[0]))
#define computeDataSize(p, u) \
- (sizeof(ioGMDData) + p * sizeof(upl_page_info_t) + u * sizeof(ioPLBlock))
-
+ (offsetof(ioGMDData, fPageList) + p * sizeof(upl_page_info_t) + u * sizeof(ioPLBlock))
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-#define next_page(a) ( trunc_page_32(a) + PAGE_SIZE )
-
+#define next_page(a) ( trunc_page(a) + PAGE_SIZE )
extern "C" {
kern_return_t device_data_action(
- int device_handle,
+ uintptr_t device_handle,
ipc_port_t device_pager,
vm_prot_t protection,
vm_object_offset_t offset,
vm_size_t size)
{
- struct ExpansionData {
- void * devicePager;
- unsigned int pagerContig:1;
- unsigned int unused:31;
- IOMemoryDescriptor * memory;
- };
kern_return_t kr;
- ExpansionData * ref = (ExpansionData *) device_handle;
+ IOMemoryDescriptorReserved * ref = (IOMemoryDescriptorReserved *) device_handle;
IOMemoryDescriptor * memDesc;
LOCK;
- memDesc = ref->memory;
+ memDesc = ref->dp.memory;
if( memDesc)
{
memDesc->retain();
- kr = memDesc->handleFault( device_pager, 0, 0,
- offset, size, kIOMapDefaultCache /*?*/);
+ kr = memDesc->handleFault(device_pager, offset, size);
memDesc->release();
}
else
}
kern_return_t device_close(
- int device_handle)
+ uintptr_t device_handle)
{
- struct ExpansionData {
- void * devicePager;
- unsigned int pagerContig:1;
- unsigned int unused:31;
- IOMemoryDescriptor * memory;
- };
- ExpansionData * ref = (ExpansionData *) device_handle;
+ IOMemoryDescriptorReserved * ref = (IOMemoryDescriptorReserved *) device_handle;
- IODelete( ref, ExpansionData, 1 );
+ IODelete( ref, IOMemoryDescriptorReserved, 1 );
return( kIOReturnSuccess );
}
}; // end extern "C"
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
// Note this inline function uses C++ reference arguments to return values
// This means that pointers are not passed and NULLs don't have to be
// checked for as a NULL reference is illegal.
static inline void
-getAddrLenForInd(user_addr_t &addr, IOPhysicalLength &len, // Output variables
+getAddrLenForInd(mach_vm_address_t &addr, mach_vm_size_t &len, // Output variables
UInt32 type, IOGeneralMemoryDescriptor::Ranges r, UInt32 ind)
{
assert(kIOMemoryTypeUIO == type
|| kIOMemoryTypePhysical == type || kIOMemoryTypePhysical64 == type);
if (kIOMemoryTypeUIO == type) {
user_size_t us;
- uio_getiov((uio_t) r.uio, ind, &addr, &us); len = us;
+ user_addr_t ad;
+ uio_getiov((uio_t) r.uio, ind, &ad, &us); addr = ad; len = us;
}
+#ifndef __LP64__
else if ((kIOMemoryTypeVirtual64 == type) || (kIOMemoryTypePhysical64 == type)) {
IOAddressRange cur = r.v64[ind];
addr = cur.address;
len = cur.length;
}
+#endif /* !__LP64__ */
else {
IOVirtualRange cur = r.v[ind];
addr = cur.address;
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-/*
- * withAddress:
- *
- * Create a new IOMemoryDescriptor. The buffer is a virtual address
- * relative to the specified task. If no task is supplied, the kernel
- * task is implied.
- */
-IOMemoryDescriptor *
-IOMemoryDescriptor::withAddress(void * address,
- IOByteCount length,
- IODirection direction)
+static IOReturn
+purgeableControlBits(IOOptionBits newState, vm_purgable_t * control, int * state)
{
- return IOMemoryDescriptor::
- withAddress((vm_address_t) address, length, direction, kernel_task);
-}
+ IOReturn err = kIOReturnSuccess;
-IOMemoryDescriptor *
-IOMemoryDescriptor::withAddress(vm_address_t address,
- IOByteCount length,
- IODirection direction,
- task_t task)
-{
-#if TEST_V64
- if (task)
- {
- IOOptionBits options = (IOOptionBits) direction;
- if (task == kernel_task)
- options |= kIOMemoryAutoPrepare;
- return (IOMemoryDescriptor::withAddressRange(address, length, options, task));
- }
-#endif
- IOGeneralMemoryDescriptor * that = new IOGeneralMemoryDescriptor;
- if (that)
+ *control = VM_PURGABLE_SET_STATE;
+
+ enum { kIOMemoryPurgeableControlMask = 15 };
+
+ switch (kIOMemoryPurgeableControlMask & newState)
{
- if (that->initWithAddress(address, length, direction, task))
- return that;
+ case kIOMemoryPurgeableKeepCurrent:
+ *control = VM_PURGABLE_GET_STATE;
+ break;
- that->release();
+ case kIOMemoryPurgeableNonVolatile:
+ *state = VM_PURGABLE_NONVOLATILE;
+ break;
+ case kIOMemoryPurgeableVolatile:
+ *state = VM_PURGABLE_VOLATILE | (newState & ~kIOMemoryPurgeableControlMask);
+ break;
+ case kIOMemoryPurgeableEmpty:
+ *state = VM_PURGABLE_EMPTY | (newState & ~kIOMemoryPurgeableControlMask);
+ break;
+ default:
+ err = kIOReturnBadArgument;
+ break;
}
- return 0;
+ return (err);
}
-IOMemoryDescriptor *
-IOMemoryDescriptor::withPhysicalAddress(
- IOPhysicalAddress address,
- IOByteCount length,
- IODirection direction )
+static IOReturn
+purgeableStateBits(int * state)
{
-#if TEST_P64
- return (IOMemoryDescriptor::withAddressRange(address, length, (IOOptionBits) direction, NULL));
-#endif
- IOGeneralMemoryDescriptor *self = new IOGeneralMemoryDescriptor;
- if (self
- && !self->initWithPhysicalAddress(address, length, direction)) {
- self->release();
- return 0;
- }
+ IOReturn err = kIOReturnSuccess;
- return self;
+ switch (VM_PURGABLE_STATE_MASK & *state)
+ {
+ case VM_PURGABLE_NONVOLATILE:
+ *state = kIOMemoryPurgeableNonVolatile;
+ break;
+ case VM_PURGABLE_VOLATILE:
+ *state = kIOMemoryPurgeableVolatile;
+ break;
+ case VM_PURGABLE_EMPTY:
+ *state = kIOMemoryPurgeableEmpty;
+ break;
+ default:
+ *state = kIOMemoryPurgeableNonVolatile;
+ err = kIOReturnNotReady;
+ break;
+ }
+ return (err);
}
-IOMemoryDescriptor *
-IOMemoryDescriptor::withRanges( IOVirtualRange * ranges,
- UInt32 withCount,
- IODirection direction,
- task_t task,
- bool asReference)
+
+static vm_prot_t
+vmProtForCacheMode(IOOptionBits cacheMode)
{
- IOGeneralMemoryDescriptor * that = new IOGeneralMemoryDescriptor;
- if (that)
+ vm_prot_t prot = 0;
+ switch (cacheMode)
{
- if (that->initWithRanges(ranges, withCount, direction, task, asReference))
- return that;
+ case kIOInhibitCache:
+ SET_MAP_MEM(MAP_MEM_IO, prot);
+ break;
- that->release();
+ case kIOWriteThruCache:
+ SET_MAP_MEM(MAP_MEM_WTHRU, prot);
+ break;
+
+ case kIOWriteCombineCache:
+ SET_MAP_MEM(MAP_MEM_WCOMB, prot);
+ break;
+
+ case kIOCopybackCache:
+ SET_MAP_MEM(MAP_MEM_COPYBACK, prot);
+ break;
+
+ case kIOCopybackInnerCache:
+ SET_MAP_MEM(MAP_MEM_INNERWBACK, prot);
+ break;
+
+ case kIODefaultCache:
+ default:
+ SET_MAP_MEM(MAP_MEM_NOOP, prot);
+ break;
}
- return 0;
-}
-IOMemoryDescriptor *
-IOMemoryDescriptor::withAddressRange(mach_vm_address_t address,
- mach_vm_size_t length,
- IOOptionBits options,
- task_t task)
-{
- IOAddressRange range = { address, length };
- return (IOMemoryDescriptor::withAddressRanges(&range, 1, options, task));
+ return (prot);
}
-IOMemoryDescriptor *
-IOMemoryDescriptor::withAddressRanges(IOAddressRange * ranges,
- UInt32 rangeCount,
- IOOptionBits options,
- task_t task)
+static unsigned int
+pagerFlagsForCacheMode(IOOptionBits cacheMode)
{
- IOGeneralMemoryDescriptor * that = new IOGeneralMemoryDescriptor;
- if (that)
+ unsigned int pagerFlags = 0;
+ switch (cacheMode)
{
- if (task)
- options |= kIOMemoryTypeVirtual64;
- else
- options |= kIOMemoryTypePhysical64;
+ case kIOInhibitCache:
+ pagerFlags = DEVICE_PAGER_CACHE_INHIB | DEVICE_PAGER_COHERENT | DEVICE_PAGER_GUARDED;
+ break;
- if (that->initWithOptions(ranges, rangeCount, 0, task, options, /* mapper */ 0))
- return that;
+ case kIOWriteThruCache:
+ pagerFlags = DEVICE_PAGER_WRITE_THROUGH | DEVICE_PAGER_COHERENT | DEVICE_PAGER_GUARDED;
+ break;
- that->release();
- }
+ case kIOWriteCombineCache:
+ pagerFlags = DEVICE_PAGER_CACHE_INHIB | DEVICE_PAGER_COHERENT;
+ break;
- return 0;
+ case kIOCopybackCache:
+ pagerFlags = DEVICE_PAGER_COHERENT;
+ break;
+
+ case kIOCopybackInnerCache:
+ pagerFlags = DEVICE_PAGER_COHERENT;
+ break;
+
+ case kIODefaultCache:
+ default:
+ pagerFlags = -1U;
+ break;
+ }
+ return (pagerFlags);
}
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-/*
- * withRanges:
- *
- * Create a new IOMemoryDescriptor. The buffer is made up of several
- * virtual address ranges, from a given task.
- *
- * Passing the ranges as a reference will avoid an extra allocation.
- */
-IOMemoryDescriptor *
-IOMemoryDescriptor::withOptions(void * buffers,
- UInt32 count,
- UInt32 offset,
- task_t task,
- IOOptionBits opts,
- IOMapper * mapper)
+struct IOMemoryEntry
{
- IOGeneralMemoryDescriptor *self = new IOGeneralMemoryDescriptor;
-
- if (self
- && !self->initWithOptions(buffers, count, offset, task, opts, mapper))
- {
- self->release();
- return 0;
- }
+ ipc_port_t entry;
+ int64_t offset;
+ uint64_t size;
+};
- return self;
-}
+struct IOMemoryReference
+{
+ volatile SInt32 refCount;
+ vm_prot_t prot;
+ uint32_t capacity;
+ uint32_t count;
+ struct IOMemoryReference * mapRef;
+ IOMemoryEntry entries[0];
+};
-// Can't leave abstract but this should never be used directly,
-bool IOMemoryDescriptor::initWithOptions(void * buffers,
- UInt32 count,
- UInt32 offset,
- task_t task,
- IOOptionBits options,
- IOMapper * mapper)
+enum
{
- // @@@ gvdl: Should I panic?
- panic("IOMD::initWithOptions called\n");
- return 0;
-}
+ kIOMemoryReferenceReuse = 0x00000001,
+ kIOMemoryReferenceWrite = 0x00000002,
+ kIOMemoryReferenceCOW = 0x00000004,
+};
-IOMemoryDescriptor *
-IOMemoryDescriptor::withPhysicalRanges( IOPhysicalRange * ranges,
- UInt32 withCount,
- IODirection direction,
- bool asReference)
+SInt32 gIOMemoryReferenceCount;
+
+IOMemoryReference *
+IOGeneralMemoryDescriptor::memoryReferenceAlloc(uint32_t capacity, IOMemoryReference * realloc)
{
- IOGeneralMemoryDescriptor * that = new IOGeneralMemoryDescriptor;
- if (that)
+ IOMemoryReference * ref;
+ size_t newSize, oldSize, copySize;
+
+ newSize = (sizeof(IOMemoryReference)
+ - sizeof(ref->entries)
+ + capacity * sizeof(ref->entries[0]));
+ ref = (typeof(ref)) IOMalloc(newSize);
+ if (realloc)
{
- if (that->initWithPhysicalRanges(ranges, withCount, direction, asReference))
- return that;
-
- that->release();
+ oldSize = (sizeof(IOMemoryReference)
+ - sizeof(realloc->entries)
+ + realloc->capacity * sizeof(realloc->entries[0]));
+ copySize = oldSize;
+ if (copySize > newSize) copySize = newSize;
+ if (ref) bcopy(realloc, ref, copySize);
+ IOFree(realloc, oldSize);
}
- return 0;
+ else if (ref)
+ {
+ bzero(ref, sizeof(*ref));
+ ref->refCount = 1;
+ OSIncrementAtomic(&gIOMemoryReferenceCount);
+ }
+ if (!ref) return (0);
+ ref->capacity = capacity;
+ return (ref);
}
-IOMemoryDescriptor *
-IOMemoryDescriptor::withSubRange(IOMemoryDescriptor * of,
- IOByteCount offset,
- IOByteCount length,
- IODirection direction)
+void
+IOGeneralMemoryDescriptor::memoryReferenceFree(IOMemoryReference * ref)
{
- IOSubMemoryDescriptor *self = new IOSubMemoryDescriptor;
+ IOMemoryEntry * entries;
+ size_t size;
- if (self && !self->initSubRange(of, offset, length, direction)) {
- self->release();
- self = 0;
+ if (ref->mapRef)
+ {
+ memoryReferenceFree(ref->mapRef);
+ ref->mapRef = 0;
}
- return self;
-}
-IOMemoryDescriptor *
-IOMemoryDescriptor::withPersistentMemoryDescriptor(IOMemoryDescriptor *originalMD)
-{
- IOGeneralMemoryDescriptor *origGenMD =
- OSDynamicCast(IOGeneralMemoryDescriptor, originalMD);
+ entries = ref->entries + ref->count;
+ while (entries > &ref->entries[0])
+ {
+ entries--;
+ ipc_port_release_send(entries->entry);
+ }
+ size = (sizeof(IOMemoryReference)
+ - sizeof(ref->entries)
+ + ref->capacity * sizeof(ref->entries[0]));
+ IOFree(ref, size);
- if (origGenMD)
- return IOGeneralMemoryDescriptor::
- withPersistentMemoryDescriptor(origGenMD);
- else
- return 0;
+ OSDecrementAtomic(&gIOMemoryReferenceCount);
}
-IOMemoryDescriptor *
-IOGeneralMemoryDescriptor::withPersistentMemoryDescriptor(IOGeneralMemoryDescriptor *originalMD)
+void
+IOGeneralMemoryDescriptor::memoryReferenceRelease(IOMemoryReference * ref)
{
- ipc_port_t sharedMem = (ipc_port_t) originalMD->createNamedEntry();
+ if (1 == OSDecrementAtomic(&ref->refCount)) memoryReferenceFree(ref);
+}
- if (!sharedMem)
- return 0;
-
- if (sharedMem == originalMD->_memEntry) {
- originalMD->retain(); // Add a new reference to ourselves
- ipc_port_release_send(sharedMem); // Remove extra send right
- return originalMD;
+
+IOReturn
+IOGeneralMemoryDescriptor::memoryReferenceCreate(
+ IOOptionBits options,
+ IOMemoryReference ** reference)
+{
+ enum { kCapacity = 4, kCapacityInc = 4 };
+
+ kern_return_t err;
+ IOMemoryReference * ref;
+ IOMemoryEntry * entries;
+ IOMemoryEntry * cloneEntries;
+ vm_map_t map;
+ ipc_port_t entry, cloneEntry;
+ vm_prot_t prot;
+ memory_object_size_t actualSize;
+ uint32_t rangeIdx;
+ uint32_t count;
+ mach_vm_address_t entryAddr, endAddr, entrySize;
+ mach_vm_size_t srcAddr, srcLen;
+ mach_vm_size_t nextAddr, nextLen;
+ mach_vm_size_t offset, remain;
+ IOByteCount physLen;
+ IOOptionBits type = (_flags & kIOMemoryTypeMask);
+ IOOptionBits cacheMode;
+ unsigned int pagerFlags;
+ vm_tag_t tag;
+
+ ref = memoryReferenceAlloc(kCapacity, NULL);
+ if (!ref) return (kIOReturnNoMemory);
+
+ tag = getVMTag(kernel_map);
+ entries = &ref->entries[0];
+ count = 0;
+ err = KERN_SUCCESS;
+
+ offset = 0;
+ rangeIdx = 0;
+ if (_task)
+ {
+ getAddrLenForInd(nextAddr, nextLen, type, _ranges, rangeIdx);
}
+ else
+ {
+ nextAddr = getPhysicalSegment(offset, &physLen, kIOMemoryMapperNone);
+ nextLen = physLen;
- IOGeneralMemoryDescriptor * self = new IOGeneralMemoryDescriptor;
- typePersMDData initData = { originalMD, sharedMem };
+ // default cache mode for physical
+ if (kIODefaultCache == ((_flags & kIOMemoryBufferCacheMask) >> kIOMemoryBufferCacheShift))
+ {
+ IOOptionBits mode;
+ pagerFlags = IODefaultCacheBits(nextAddr);
+ if (DEVICE_PAGER_CACHE_INHIB & pagerFlags)
+ {
+ if (DEVICE_PAGER_GUARDED & pagerFlags)
+ mode = kIOInhibitCache;
+ else
+ mode = kIOWriteCombineCache;
+ }
+ else if (DEVICE_PAGER_WRITE_THROUGH & pagerFlags)
+ mode = kIOWriteThruCache;
+ else
+ mode = kIOCopybackCache;
+ _flags |= (mode << kIOMemoryBufferCacheShift);
+ }
+ }
- if (self
- && !self->initWithOptions(&initData, 1, 0, 0, kIOMemoryTypePersistentMD, 0)) {
- self->release();
- self = 0;
+ // cache mode & vm_prot
+ prot = VM_PROT_READ;
+ cacheMode = ((_flags & kIOMemoryBufferCacheMask) >> kIOMemoryBufferCacheShift);
+ prot |= vmProtForCacheMode(cacheMode);
+ // VM system requires write access to change cache mode
+ if (kIODefaultCache != cacheMode) prot |= VM_PROT_WRITE;
+ if (kIODirectionOut != (kIODirectionOutIn & _flags)) prot |= VM_PROT_WRITE;
+ if (kIOMemoryReferenceWrite & options) prot |= VM_PROT_WRITE;
+ if (kIOMemoryReferenceCOW & options) prot |= MAP_MEM_VM_COPY;
+
+ if ((kIOMemoryReferenceReuse & options) && _memRef)
+ {
+ cloneEntries = &_memRef->entries[0];
+ prot |= MAP_MEM_NAMED_REUSE;
}
- return self;
-}
-void *IOGeneralMemoryDescriptor::createNamedEntry()
-{
- kern_return_t error;
- ipc_port_t sharedMem;
+ if (_task)
+ {
+ // virtual ranges
- IOOptionBits type = _flags & kIOMemoryTypeMask;
+ if (kIOMemoryBufferPageable & _flags)
+ {
+ // IOBufferMemoryDescriptor alloc - set flags for entry + object create
+ prot |= MAP_MEM_NAMED_CREATE;
+ if (kIOMemoryBufferPurgeable & _flags) prot |= MAP_MEM_PURGABLE;
+ if (kIOMemoryUseReserve & _flags) prot |= MAP_MEM_GRAB_SECLUDED;
- user_addr_t range0Addr;
- IOByteCount range0Len;
- getAddrLenForInd(range0Addr, range0Len, type, _ranges, 0);
- range0Addr = trunc_page_64(range0Addr);
+ prot |= VM_PROT_WRITE;
+ map = NULL;
+ }
+ else map = get_task_map(_task);
- vm_size_t size = ptoa_32(_pages);
- vm_address_t kernelPage = (vm_address_t) range0Addr;
+ remain = _length;
+ while (remain)
+ {
+ srcAddr = nextAddr;
+ srcLen = nextLen;
+ nextAddr = 0;
+ nextLen = 0;
+ // coalesce addr range
+ for (++rangeIdx; rangeIdx < _rangesCount; rangeIdx++)
+ {
+ getAddrLenForInd(nextAddr, nextLen, type, _ranges, rangeIdx);
+ if ((srcAddr + srcLen) != nextAddr) break;
+ srcLen += nextLen;
+ }
+ entryAddr = trunc_page_64(srcAddr);
+ endAddr = round_page_64(srcAddr + srcLen);
+ do
+ {
+ entrySize = (endAddr - entryAddr);
+ if (!entrySize) break;
+ actualSize = entrySize;
- vm_map_t theMap = ((_task == kernel_task)
- && (kIOMemoryBufferPageable & _flags))
- ? IOPageableMapForAddress(kernelPage)
- : get_task_map(_task);
+ cloneEntry = MACH_PORT_NULL;
+ if (MAP_MEM_NAMED_REUSE & prot)
+ {
+ if (cloneEntries < &_memRef->entries[_memRef->count]) cloneEntry = cloneEntries->entry;
+ else prot &= ~MAP_MEM_NAMED_REUSE;
+ }
- memory_object_size_t actualSize = size;
- vm_prot_t prot = VM_PROT_READ;
-#if CONFIG_EMBEDDED
- if (kIODirectionOut != (kIODirectionOutIn & _flags))
-#endif
- prot |= VM_PROT_WRITE;
+ err = mach_make_memory_entry_64(map,
+ &actualSize, entryAddr, prot, &entry, cloneEntry);
- if (_memEntry)
- prot |= MAP_MEM_NAMED_REUSE;
+ if (KERN_SUCCESS != err) break;
+ if (actualSize > entrySize) panic("mach_make_memory_entry_64 actualSize");
- error = mach_make_memory_entry_64(theMap,
- &actualSize, range0Addr, prot, &sharedMem, (ipc_port_t) _memEntry);
-
- if (KERN_SUCCESS == error) {
- if (actualSize == size) {
- return sharedMem;
- } else {
-#if IOASSERT
- IOLog("IOGMD::mach_make_memory_entry_64 (%08llx) size (%08lx:%08x)\n",
- (UInt64)range0Addr, (UInt32)actualSize, size);
-#endif
- ipc_port_release_send( sharedMem );
+ if (count >= ref->capacity)
+ {
+ ref = memoryReferenceAlloc(ref->capacity + kCapacityInc, ref);
+ entries = &ref->entries[count];
+ }
+ entries->entry = entry;
+ entries->size = actualSize;
+ entries->offset = offset + (entryAddr - srcAddr);
+ entryAddr += actualSize;
+ if (MAP_MEM_NAMED_REUSE & prot)
+ {
+ if ((cloneEntries->entry == entries->entry)
+ && (cloneEntries->size == entries->size)
+ && (cloneEntries->offset == entries->offset)) cloneEntries++;
+ else prot &= ~MAP_MEM_NAMED_REUSE;
+ }
+ entries++;
+ count++;
+ }
+ while (true);
+ offset += srcLen;
+ remain -= srcLen;
}
}
-
- return MACH_PORT_NULL;
+ else
+ {
+ // _task == 0, physical or kIOMemoryTypeUPL
+ memory_object_t pager;
+ vm_size_t size = ptoa_32(_pages);
+
+ if (!getKernelReserved()) panic("getKernelReserved");
+
+ reserved->dp.pagerContig = (1 == _rangesCount);
+ reserved->dp.memory = this;
+
+ pagerFlags = pagerFlagsForCacheMode(cacheMode);
+ if (-1U == pagerFlags) panic("phys is kIODefaultCache");
+ if (reserved->dp.pagerContig) pagerFlags |= DEVICE_PAGER_CONTIGUOUS;
+
+ pager = device_pager_setup((memory_object_t) 0, (uintptr_t) reserved,
+ size, pagerFlags);
+ assert (pager);
+ if (!pager) err = kIOReturnVMError;
+ else
+ {
+ srcAddr = nextAddr;
+ entryAddr = trunc_page_64(srcAddr);
+ err = mach_memory_object_memory_entry_64((host_t) 1, false /*internal*/,
+ size, VM_PROT_READ | VM_PROT_WRITE, pager, &entry);
+ assert (KERN_SUCCESS == err);
+ if (KERN_SUCCESS != err) device_pager_deallocate(pager);
+ else
+ {
+ reserved->dp.devicePager = pager;
+ entries->entry = entry;
+ entries->size = size;
+ entries->offset = offset + (entryAddr - srcAddr);
+ entries++;
+ count++;
+ }
+ }
+ }
+
+ ref->count = count;
+ ref->prot = prot;
+
+ if (_task && (KERN_SUCCESS == err)
+ && (kIOMemoryMapCopyOnWrite & _flags)
+ && !(kIOMemoryReferenceCOW & options))
+ {
+ err = memoryReferenceCreate(options | kIOMemoryReferenceCOW, &ref->mapRef);
+ }
+
+ if (KERN_SUCCESS == err)
+ {
+ if (MAP_MEM_NAMED_REUSE & prot)
+ {
+ memoryReferenceFree(ref);
+ OSIncrementAtomic(&_memRef->refCount);
+ ref = _memRef;
+ }
+ }
+ else
+ {
+ memoryReferenceFree(ref);
+ ref = NULL;
+ }
+
+ *reference = ref;
+
+ return (err);
+}
+
+kern_return_t
+IOMemoryDescriptorMapAlloc(vm_map_t map, void * _ref)
+{
+ IOMemoryDescriptorMapAllocRef * ref = (typeof(ref))_ref;
+ IOReturn err;
+ vm_map_offset_t addr;
+
+ addr = ref->mapped;
+
+ err = vm_map_enter_mem_object(map, &addr, ref->size,
+ (vm_map_offset_t) 0,
+ (((ref->options & kIOMapAnywhere)
+ ? VM_FLAGS_ANYWHERE
+ : VM_FLAGS_FIXED)
+ | VM_MAKE_TAG(ref->tag)),
+ IPC_PORT_NULL,
+ (memory_object_offset_t) 0,
+ false, /* copy */
+ ref->prot,
+ ref->prot,
+ VM_INHERIT_NONE);
+ if (KERN_SUCCESS == err)
+ {
+ ref->mapped = (mach_vm_address_t) addr;
+ ref->map = map;
+ }
+
+ return( err );
+}
+
+IOReturn
+IOGeneralMemoryDescriptor::memoryReferenceMap(
+ IOMemoryReference * ref,
+ vm_map_t map,
+ mach_vm_size_t inoffset,
+ mach_vm_size_t size,
+ IOOptionBits options,
+ mach_vm_address_t * inaddr)
+{
+ IOReturn err;
+ int64_t offset = inoffset;
+ uint32_t rangeIdx, entryIdx;
+ vm_map_offset_t addr, mapAddr;
+ vm_map_offset_t pageOffset, entryOffset, remain, chunk;
+
+ mach_vm_address_t nextAddr;
+ mach_vm_size_t nextLen;
+ IOByteCount physLen;
+ IOMemoryEntry * entry;
+ vm_prot_t prot, memEntryCacheMode;
+ IOOptionBits type;
+ IOOptionBits cacheMode;
+ vm_tag_t tag;
+ // for the kIOMapPrefault option.
+ upl_page_info_t * pageList = NULL;
+ UInt currentPageIndex = 0;
+ bool didAlloc;
+
+ if (ref->mapRef)
+ {
+ err = memoryReferenceMap(ref->mapRef, map, inoffset, size, options, inaddr);
+ return (err);
+ }
+
+ type = _flags & kIOMemoryTypeMask;
+
+ prot = VM_PROT_READ;
+ if (!(kIOMapReadOnly & options)) prot |= VM_PROT_WRITE;
+ prot &= ref->prot;
+
+ cacheMode = ((options & kIOMapCacheMask) >> kIOMapCacheShift);
+ if (kIODefaultCache != cacheMode)
+ {
+ // VM system requires write access to update named entry cache mode
+ memEntryCacheMode = (MAP_MEM_ONLY | VM_PROT_WRITE | prot | vmProtForCacheMode(cacheMode));
+ }
+
+ tag = getVMTag(map);
+
+ if (_task)
+ {
+ // Find first range for offset
+ if (!_rangesCount) return (kIOReturnBadArgument);
+ for (remain = offset, rangeIdx = 0; rangeIdx < _rangesCount; rangeIdx++)
+ {
+ getAddrLenForInd(nextAddr, nextLen, type, _ranges, rangeIdx);
+ if (remain < nextLen) break;
+ remain -= nextLen;
+ }
+ }
+ else
+ {
+ rangeIdx = 0;
+ remain = 0;
+ nextAddr = getPhysicalSegment(offset, &physLen, kIOMemoryMapperNone);
+ nextLen = size;
+ }
+
+ assert(remain < nextLen);
+ if (remain >= nextLen) return (kIOReturnBadArgument);
+
+ nextAddr += remain;
+ nextLen -= remain;
+ pageOffset = (page_mask & nextAddr);
+ addr = 0;
+ didAlloc = false;
+
+ if (!(options & kIOMapAnywhere))
+ {
+ addr = *inaddr;
+ if (pageOffset != (page_mask & addr)) return (kIOReturnNotAligned);
+ addr -= pageOffset;
+ }
+
+ // find first entry for offset
+ for (entryIdx = 0;
+ (entryIdx < ref->count) && (offset >= ref->entries[entryIdx].offset);
+ entryIdx++) {}
+ entryIdx--;
+ entry = &ref->entries[entryIdx];
+
+ // allocate VM
+ size = round_page_64(size + pageOffset);
+ if (kIOMapOverwrite & options)
+ {
+ if ((map == kernel_map) && (kIOMemoryBufferPageable & _flags))
+ {
+ map = IOPageableMapForAddress(addr);
+ }
+ err = KERN_SUCCESS;
+ }
+ else
+ {
+ IOMemoryDescriptorMapAllocRef ref;
+ ref.map = map;
+ ref.tag = tag;
+ ref.options = options;
+ ref.size = size;
+ ref.prot = prot;
+ if (options & kIOMapAnywhere)
+ // vm_map looks for addresses above here, even when VM_FLAGS_ANYWHERE
+ ref.mapped = 0;
+ else
+ ref.mapped = addr;
+ if ((ref.map == kernel_map) && (kIOMemoryBufferPageable & _flags))
+ err = IOIteratePageableMaps( ref.size, &IOMemoryDescriptorMapAlloc, &ref );
+ else
+ err = IOMemoryDescriptorMapAlloc(ref.map, &ref);
+ if (KERN_SUCCESS == err)
+ {
+ addr = ref.mapped;
+ map = ref.map;
+ didAlloc = true;
+ }
+ }
+
+ /*
+ * Prefaulting is only possible if we wired the memory earlier. Check the
+ * memory type, and the underlying data.
+ */
+ if (options & kIOMapPrefault)
+ {
+ /*
+ * The memory must have been wired by calling ::prepare(), otherwise
+ * we don't have the UPL. Without UPLs, pages cannot be pre-faulted
+ */
+ assert(map != kernel_map);
+ assert(_wireCount != 0);
+ assert(_memoryEntries != NULL);
+ if ((map == kernel_map) ||
+ (_wireCount == 0) ||
+ (_memoryEntries == NULL))
+ {
+ return kIOReturnBadArgument;
+ }
+
+ // Get the page list.
+ ioGMDData* dataP = getDataP(_memoryEntries);
+ ioPLBlock const* ioplList = getIOPLList(dataP);
+ pageList = getPageList(dataP);
+
+ // Get the number of IOPLs.
+ UInt numIOPLs = getNumIOPL(_memoryEntries, dataP);
+
+ /*
+ * Scan through the IOPL Info Blocks, looking for the first block containing
+ * the offset. The research will go past it, so we'll need to go back to the
+ * right range at the end.
+ */
+ UInt ioplIndex = 0;
+ while (ioplIndex < numIOPLs && offset >= ioplList[ioplIndex].fIOMDOffset)
+ ioplIndex++;
+ ioplIndex--;
+
+ // Retrieve the IOPL info block.
+ ioPLBlock ioplInfo = ioplList[ioplIndex];
+
+ /*
+ * For external UPLs, the fPageInfo points directly to the UPL's page_info_t
+ * array.
+ */
+ if (ioplInfo.fFlags & kIOPLExternUPL)
+ pageList = (upl_page_info_t*) ioplInfo.fPageInfo;
+ else
+ pageList = &pageList[ioplInfo.fPageInfo];
+
+ // Rebase [offset] into the IOPL in order to looks for the first page index.
+ mach_vm_size_t offsetInIOPL = offset - ioplInfo.fIOMDOffset + ioplInfo.fPageOffset;
+
+ // Retrieve the index of the first page corresponding to the offset.
+ currentPageIndex = atop_32(offsetInIOPL);
+ }
+
+ // enter mappings
+ remain = size;
+ mapAddr = addr;
+ addr += pageOffset;
+
+ while (remain && (KERN_SUCCESS == err))
+ {
+ entryOffset = offset - entry->offset;
+ if ((page_mask & entryOffset) != pageOffset)
+ {
+ err = kIOReturnNotAligned;
+ break;
+ }
+
+ if (kIODefaultCache != cacheMode)
+ {
+ vm_size_t unused = 0;
+ err = mach_make_memory_entry(NULL /*unused*/, &unused, 0 /*unused*/,
+ memEntryCacheMode, NULL, entry->entry);
+ assert (KERN_SUCCESS == err);
+ }
+
+ entryOffset -= pageOffset;
+ if (entryOffset >= entry->size) panic("entryOffset");
+ chunk = entry->size - entryOffset;
+ if (chunk)
+ {
+ if (chunk > remain) chunk = remain;
+ if (options & kIOMapPrefault)
+ {
+ UInt nb_pages = round_page(chunk) / PAGE_SIZE;
+ err = vm_map_enter_mem_object_prefault(map,
+ &mapAddr,
+ chunk, 0 /* mask */,
+ (VM_FLAGS_FIXED
+ | VM_FLAGS_OVERWRITE
+ | VM_MAKE_TAG(tag)
+ | VM_FLAGS_IOKIT_ACCT), /* iokit accounting */
+ entry->entry,
+ entryOffset,
+ prot, // cur
+ prot, // max
+ &pageList[currentPageIndex],
+ nb_pages);
+
+ // Compute the next index in the page list.
+ currentPageIndex += nb_pages;
+ assert(currentPageIndex <= _pages);
+ }
+ else
+ {
+ err = vm_map_enter_mem_object(map,
+ &mapAddr,
+ chunk, 0 /* mask */,
+ (VM_FLAGS_FIXED
+ | VM_FLAGS_OVERWRITE
+ | VM_MAKE_TAG(tag)
+ | VM_FLAGS_IOKIT_ACCT), /* iokit accounting */
+ entry->entry,
+ entryOffset,
+ false, // copy
+ prot, // cur
+ prot, // max
+ VM_INHERIT_NONE);
+ }
+ if (KERN_SUCCESS != err) break;
+ remain -= chunk;
+ if (!remain) break;
+ mapAddr += chunk;
+ offset += chunk - pageOffset;
+ }
+ pageOffset = 0;
+ entry++;
+ entryIdx++;
+ if (entryIdx >= ref->count)
+ {
+ err = kIOReturnOverrun;
+ break;
+ }
+ }
+
+ if ((KERN_SUCCESS != err) && didAlloc)
+ {
+ (void) mach_vm_deallocate(map, trunc_page_64(addr), size);
+ addr = 0;
+ }
+ *inaddr = addr;
+
+ return (err);
+}
+
+IOReturn
+IOGeneralMemoryDescriptor::memoryReferenceGetPageCounts(
+ IOMemoryReference * ref,
+ IOByteCount * residentPageCount,
+ IOByteCount * dirtyPageCount)
+{
+ IOReturn err;
+ IOMemoryEntry * entries;
+ unsigned int resident, dirty;
+ unsigned int totalResident, totalDirty;
+
+ totalResident = totalDirty = 0;
+ err = kIOReturnSuccess;
+ entries = ref->entries + ref->count;
+ while (entries > &ref->entries[0])
+ {
+ entries--;
+ err = mach_memory_entry_get_page_counts(entries->entry, &resident, &dirty);
+ if (KERN_SUCCESS != err) break;
+ totalResident += resident;
+ totalDirty += dirty;
+ }
+
+ if (residentPageCount) *residentPageCount = totalResident;
+ if (dirtyPageCount) *dirtyPageCount = totalDirty;
+ return (err);
+}
+
+IOReturn
+IOGeneralMemoryDescriptor::memoryReferenceSetPurgeable(
+ IOMemoryReference * ref,
+ IOOptionBits newState,
+ IOOptionBits * oldState)
+{
+ IOReturn err;
+ IOMemoryEntry * entries;
+ vm_purgable_t control;
+ int totalState, state;
+
+ totalState = kIOMemoryPurgeableNonVolatile;
+ err = kIOReturnSuccess;
+ entries = ref->entries + ref->count;
+ while (entries > &ref->entries[0])
+ {
+ entries--;
+
+ err = purgeableControlBits(newState, &control, &state);
+ if (KERN_SUCCESS != err) break;
+ err = mach_memory_entry_purgable_control(entries->entry, control, &state);
+ if (KERN_SUCCESS != err) break;
+ err = purgeableStateBits(&state);
+ if (KERN_SUCCESS != err) break;
+
+ if (kIOMemoryPurgeableEmpty == state) totalState = kIOMemoryPurgeableEmpty;
+ else if (kIOMemoryPurgeableEmpty == totalState) continue;
+ else if (kIOMemoryPurgeableVolatile == totalState) continue;
+ else if (kIOMemoryPurgeableVolatile == state) totalState = kIOMemoryPurgeableVolatile;
+ else totalState = kIOMemoryPurgeableNonVolatile;
+ }
+
+ if (oldState) *oldState = totalState;
+ return (err);
+}
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+IOMemoryDescriptor *
+IOMemoryDescriptor::withAddress(void * address,
+ IOByteCount length,
+ IODirection direction)
+{
+ return IOMemoryDescriptor::
+ withAddressRange((IOVirtualAddress) address, length, direction | kIOMemoryAutoPrepare, kernel_task);
+}
+
+#ifndef __LP64__
+IOMemoryDescriptor *
+IOMemoryDescriptor::withAddress(IOVirtualAddress address,
+ IOByteCount length,
+ IODirection direction,
+ task_t task)
+{
+ IOGeneralMemoryDescriptor * that = new IOGeneralMemoryDescriptor;
+ if (that)
+ {
+ if (that->initWithAddress(address, length, direction, task))
+ return that;
+
+ that->release();
+ }
+ return 0;
+}
+#endif /* !__LP64__ */
+
+IOMemoryDescriptor *
+IOMemoryDescriptor::withPhysicalAddress(
+ IOPhysicalAddress address,
+ IOByteCount length,
+ IODirection direction )
+{
+ return (IOMemoryDescriptor::withAddressRange(address, length, direction, TASK_NULL));
+}
+
+#ifndef __LP64__
+IOMemoryDescriptor *
+IOMemoryDescriptor::withRanges( IOVirtualRange * ranges,
+ UInt32 withCount,
+ IODirection direction,
+ task_t task,
+ bool asReference)
+{
+ IOGeneralMemoryDescriptor * that = new IOGeneralMemoryDescriptor;
+ if (that)
+ {
+ if (that->initWithRanges(ranges, withCount, direction, task, asReference))
+ return that;
+
+ that->release();
+ }
+ return 0;
}
+#endif /* !__LP64__ */
+
+IOMemoryDescriptor *
+IOMemoryDescriptor::withAddressRange(mach_vm_address_t address,
+ mach_vm_size_t length,
+ IOOptionBits options,
+ task_t task)
+{
+ IOAddressRange range = { address, length };
+ return (IOMemoryDescriptor::withAddressRanges(&range, 1, options, task));
+}
+
+IOMemoryDescriptor *
+IOMemoryDescriptor::withAddressRanges(IOAddressRange * ranges,
+ UInt32 rangeCount,
+ IOOptionBits options,
+ task_t task)
+{
+ IOGeneralMemoryDescriptor * that = new IOGeneralMemoryDescriptor;
+ if (that)
+ {
+ if (task)
+ options |= kIOMemoryTypeVirtual64;
+ else
+ options |= kIOMemoryTypePhysical64;
+
+ if (that->initWithOptions(ranges, rangeCount, 0, task, options, /* mapper */ 0))
+ return that;
+
+ that->release();
+ }
+
+ return 0;
+}
+
/*
- * initWithAddress:
+ * withOptions:
*
- * Initialize an IOMemoryDescriptor. The buffer is a virtual address
- * relative to the specified task. If no task is supplied, the kernel
- * task is implied.
+ * Create a new IOMemoryDescriptor. The buffer is made up of several
+ * virtual address ranges, from a given task.
*
- * An IOMemoryDescriptor can be re-used by calling initWithAddress or
- * initWithRanges again on an existing instance -- note this behavior
- * is not commonly supported in other I/O Kit classes, although it is
- * supported here.
+ * Passing the ranges as a reference will avoid an extra allocation.
*/
+IOMemoryDescriptor *
+IOMemoryDescriptor::withOptions(void * buffers,
+ UInt32 count,
+ UInt32 offset,
+ task_t task,
+ IOOptionBits opts,
+ IOMapper * mapper)
+{
+ IOGeneralMemoryDescriptor *self = new IOGeneralMemoryDescriptor;
+
+ if (self
+ && !self->initWithOptions(buffers, count, offset, task, opts, mapper))
+ {
+ self->release();
+ return 0;
+ }
+
+ return self;
+}
+
+bool IOMemoryDescriptor::initWithOptions(void * buffers,
+ UInt32 count,
+ UInt32 offset,
+ task_t task,
+ IOOptionBits options,
+ IOMapper * mapper)
+{
+ return( false );
+}
+
+#ifndef __LP64__
+IOMemoryDescriptor *
+IOMemoryDescriptor::withPhysicalRanges( IOPhysicalRange * ranges,
+ UInt32 withCount,
+ IODirection direction,
+ bool asReference)
+{
+ IOGeneralMemoryDescriptor * that = new IOGeneralMemoryDescriptor;
+ if (that)
+ {
+ if (that->initWithPhysicalRanges(ranges, withCount, direction, asReference))
+ return that;
+
+ that->release();
+ }
+ return 0;
+}
+
+IOMemoryDescriptor *
+IOMemoryDescriptor::withSubRange(IOMemoryDescriptor * of,
+ IOByteCount offset,
+ IOByteCount length,
+ IODirection direction)
+{
+ return (IOSubMemoryDescriptor::withSubRange(of, offset, length, direction));
+}
+#endif /* !__LP64__ */
+
+IOMemoryDescriptor *
+IOMemoryDescriptor::withPersistentMemoryDescriptor(IOMemoryDescriptor *originalMD)
+{
+ IOGeneralMemoryDescriptor *origGenMD =
+ OSDynamicCast(IOGeneralMemoryDescriptor, originalMD);
+
+ if (origGenMD)
+ return IOGeneralMemoryDescriptor::
+ withPersistentMemoryDescriptor(origGenMD);
+ else
+ return 0;
+}
+
+IOMemoryDescriptor *
+IOGeneralMemoryDescriptor::withPersistentMemoryDescriptor(IOGeneralMemoryDescriptor *originalMD)
+{
+ IOMemoryReference * memRef;
+
+ if (kIOReturnSuccess != originalMD->memoryReferenceCreate(kIOMemoryReferenceReuse, &memRef)) return (0);
+
+ if (memRef == originalMD->_memRef)
+ {
+ originalMD->retain(); // Add a new reference to ourselves
+ originalMD->memoryReferenceRelease(memRef);
+ return originalMD;
+ }
+
+ IOGeneralMemoryDescriptor * self = new IOGeneralMemoryDescriptor;
+ IOMDPersistentInitData initData = { originalMD, memRef };
+
+ if (self
+ && !self->initWithOptions(&initData, 1, 0, 0, kIOMemoryTypePersistentMD, 0)) {
+ self->release();
+ self = 0;
+ }
+ return self;
+}
+
+#ifndef __LP64__
bool
IOGeneralMemoryDescriptor::initWithAddress(void * address,
IOByteCount withLength,
IODirection withDirection)
{
- _singleRange.v.address = (vm_address_t) address;
+ _singleRange.v.address = (vm_offset_t) address;
_singleRange.v.length = withLength;
return initWithRanges(&_singleRange.v, 1, withDirection, kernel_task, true);
}
bool
-IOGeneralMemoryDescriptor::initWithAddress(vm_address_t address,
+IOGeneralMemoryDescriptor::initWithAddress(IOVirtualAddress address,
IOByteCount withLength,
IODirection withDirection,
task_t withTask)
return initWithOptions(ranges, count, 0, task, mdOpts, /* mapper */ 0);
}
+#endif /* !__LP64__ */
/*
* initWithOptions:
{
IOOptionBits type = options & kIOMemoryTypeMask;
+#ifndef __LP64__
+ if (task
+ && (kIOMemoryTypeVirtual == type)
+ && vm_map_is_64bit(get_task_map(task))
+ && ((IOVirtualRange *) buffers)->address)
+ {
+ OSReportWithBacktrace("IOMemoryDescriptor: attempt to create 32b virtual in 64b task, use ::withAddressRange()");
+ return false;
+ }
+#endif /* !__LP64__ */
+
// Grab the original MD's configuation data to initialse the
// arguments to this function.
if (kIOMemoryTypePersistentMD == type) {
- typePersMDData *initData = (typePersMDData *) buffers;
+ IOMDPersistentInitData *initData = (typeof(initData)) buffers;
const IOGeneralMemoryDescriptor *orig = initData->fMD;
ioGMDData *dataP = getDataP(orig->_memoryEntries);
if ( !(orig->_flags & kIOMemoryPersistent) || !dataP)
return false;
- _memEntry = initData->fMemEntry; // Grab the new named entry
- options = orig->_flags | kIOMemoryAsReference;
- _singleRange = orig->_singleRange; // Initialise our range
- buffers = &_singleRange;
- count = 1;
+ _memRef = initData->fMemRef; // Grab the new named entry
+ options = orig->_flags & ~kIOMemoryAsReference;
+ type = options & kIOMemoryTypeMask;
+ buffers = orig->_ranges.v;
+ count = orig->_rangesCount;
// Now grab the original task and whatever mapper was previously used
task = orig->_task;
switch (type) {
case kIOMemoryTypeUIO:
case kIOMemoryTypeVirtual:
+#ifndef __LP64__
case kIOMemoryTypeVirtual64:
+#endif /* !__LP64__ */
assert(task);
if (!task)
return false;
-
- if (vm_map_is_64bit(get_task_map(task))
- && (kIOMemoryTypeVirtual == type)
- && ((IOVirtualRange *) buffers)->address)
- {
- OSReportWithBacktrace("IOMemoryDescriptor: attempt to create 32b virtual in 64b task, use ::withAddressRange()");
- return false;
- }
break;
case kIOMemoryTypePhysical: // Neither Physical nor UPL should have a task
+#ifndef __LP64__
case kIOMemoryTypePhysical64:
- mapper = kIOMapperNone;
-
+#endif /* !__LP64__ */
case kIOMemoryTypeUPL:
assert(!task);
break;
while (_wireCount)
complete();
}
- if (_ranges.v && _rangesIsAllocated)
+ if (_ranges.v && !(kIOMemoryAsReference & _flags))
{
if (kIOMemoryTypeUIO == type)
uio_free((uio_t) _ranges.v);
+#ifndef __LP64__
else if ((kIOMemoryTypeVirtual64 == type) || (kIOMemoryTypePhysical64 == type))
IODelete(_ranges.v64, IOAddressRange, _rangesCount);
+#endif /* !__LP64__ */
else
IODelete(_ranges.v, IOVirtualRange, _rangesCount);
}
- if (_memEntry)
- { ipc_port_release_send((ipc_port_t) _memEntry); _memEntry = 0; }
- if (_mappings)
- _mappings->flushCollection();
+ options |= (kIOMemoryRedirected & _flags);
+ if (!(kIOMemoryRedirected & options))
+ {
+ if (_memRef)
+ {
+ memoryReferenceRelease(_memRef);
+ _memRef = 0;
+ }
+ if (_mappings)
+ _mappings->flushCollection();
+ }
}
else {
if (!super::init())
}
// Grab the appropriate mapper
- if (mapper == kIOMapperNone)
+ if (kIOMemoryHostOnly & options) options |= kIOMemoryMapperNone;
+ if (kIOMemoryMapperNone & options)
mapper = 0; // No Mapper
else if (mapper == kIOMapperSystem) {
IOMapper::checkForSystemMapper();
_flags = options;
_task = task;
- // DEPRECATED variable initialisation
+#ifndef __LP64__
_direction = (IODirection) (_flags & kIOMemoryDirectionMask);
+#endif /* !__LP64__ */
__iomd_reservedA = 0;
__iomd_reservedB = 0;
ioGMDData *dataP;
unsigned int dataSize = computeDataSize(/* pages */ 0, /* upls */ 1);
- if (!_memoryEntries) {
- _memoryEntries = OSData::withCapacity(dataSize);
- if (!_memoryEntries)
- return false;
- }
- else if (!_memoryEntries->initWithCapacity(dataSize))
- return false;
-
- _memoryEntries->appendBytes(0, sizeof(ioGMDData));
+ if (!initMemoryEntries(dataSize, mapper)) return (false);
dataP = getDataP(_memoryEntries);
- dataP->fMapper = mapper;
dataP->fPageCnt = 0;
// _wireCount++; // UPLs start out life wired
_pages += atop_32(offset + count + PAGE_MASK) - atop_32(offset);
ioPLBlock iopl;
- upl_page_info_t *pageList = UPL_GET_INTERNAL_PAGE_LIST((upl_t) buffers);
-
iopl.fIOPL = (upl_t) buffers;
- // Set the flag kIOPLOnDevice convieniently equal to 1
- iopl.fFlags = pageList->device | kIOPLExternUPL;
- iopl.fIOMDOffset = 0;
+ upl_set_referenced(iopl.fIOPL, true);
+ upl_page_info_t *pageList = UPL_GET_INTERNAL_PAGE_LIST(iopl.fIOPL);
+
+ if (upl_get_size(iopl.fIOPL) < (count + offset))
+ panic("short external upl");
_highestPage = upl_get_highest_page(iopl.fIOPL);
+ // Set the flag kIOPLOnDevice convieniently equal to 1
+ iopl.fFlags = pageList->device | kIOPLExternUPL;
if (!pageList->device) {
// Pre-compute the offset into the UPL's page list
pageList = &pageList[atop_32(offset)];
offset &= PAGE_MASK;
- if (mapper) {
- iopl.fMappedBase = mapper->iovmAlloc(_pages);
- mapper->iovmInsert(iopl.fMappedBase, 0, pageList, _pages);
- }
- else
- iopl.fMappedBase = 0;
}
- else
- iopl.fMappedBase = 0;
+ iopl.fIOMDOffset = 0;
+ iopl.fMappedPage = 0;
iopl.fPageInfo = (vm_address_t) pageList;
iopl.fPageOffset = offset;
-
_memoryEntries->appendBytes(&iopl, sizeof(iopl));
}
else {
// Initialize the memory descriptor
if (options & kIOMemoryAsReference) {
+#ifndef __LP64__
_rangesIsAllocated = false;
+#endif /* !__LP64__ */
// Hack assignment to get the buffer arg into _ranges.
// I'd prefer to do _ranges = (Ranges) buffers, but that doesn't
_ranges.v = (IOVirtualRange *) buffers;
}
else {
+#ifndef __LP64__
_rangesIsAllocated = true;
- switch (_flags & kIOMemoryTypeMask)
+#endif /* !__LP64__ */
+ switch (type)
{
case kIOMemoryTypeUIO:
_ranges.v = (IOVirtualRange *) uio_duplicate((uio_t) buffers);
break;
+#ifndef __LP64__
case kIOMemoryTypeVirtual64:
case kIOMemoryTypePhysical64:
+ if (count == 1
+ && (((IOAddressRange *) buffers)->address + ((IOAddressRange *) buffers)->length) <= 0x100000000ULL
+ ) {
+ if (kIOMemoryTypeVirtual64 == type)
+ type = kIOMemoryTypeVirtual;
+ else
+ type = kIOMemoryTypePhysical;
+ _flags = (_flags & ~kIOMemoryTypeMask) | type | kIOMemoryAsReference;
+ _rangesIsAllocated = false;
+ _ranges.v = &_singleRange.v;
+ _singleRange.v.address = ((IOAddressRange *) buffers)->address;
+ _singleRange.v.length = ((IOAddressRange *) buffers)->length;
+ break;
+ }
_ranges.v64 = IONew(IOAddressRange, count);
if (!_ranges.v64)
return false;
bcopy(buffers, _ranges.v, count * sizeof(IOAddressRange));
break;
+#endif /* !__LP64__ */
case kIOMemoryTypeVirtual:
case kIOMemoryTypePhysical:
- _ranges.v = IONew(IOVirtualRange, count);
- if (!_ranges.v)
- return false;
+ if (count == 1) {
+ _flags |= kIOMemoryAsReference;
+#ifndef __LP64__
+ _rangesIsAllocated = false;
+#endif /* !__LP64__ */
+ _ranges.v = &_singleRange.v;
+ } else {
+ _ranges.v = IONew(IOVirtualRange, count);
+ if (!_ranges.v)
+ return false;
+ }
bcopy(buffers, _ranges.v, count * sizeof(IOVirtualRange));
break;
}
// Find starting address within the vector of ranges
Ranges vec = _ranges;
- UInt32 length = 0;
- UInt32 pages = 0;
- for (unsigned ind = 0; ind < count; ind++) {
- user_addr_t addr;
- UInt32 len;
+ mach_vm_size_t totalLength = 0;
+ unsigned int ind, pages = 0;
+ for (ind = 0; ind < count; ind++) {
+ mach_vm_address_t addr;
+ mach_vm_address_t endAddr;
+ mach_vm_size_t len;
// addr & len are returned by this function
getAddrLenForInd(addr, len, type, vec, ind);
- pages += (atop_64(addr + len + PAGE_MASK) - atop_64(addr));
- len += length;
- assert(len >= length); // Check for 32 bit wrap around
- length = len;
-
+ if (os_add3_overflow(addr, len, PAGE_MASK, &endAddr)) break;
+ if (os_add_overflow(pages, (atop_64(endAddr) - atop_64(addr)), &pages)) break;
+ if (os_add_overflow(totalLength, len, &totalLength)) break;
if ((kIOMemoryTypePhysical == type) || (kIOMemoryTypePhysical64 == type))
{
ppnum_t highPage = atop_64(addr + len - 1);
_highestPage = highPage;
}
}
- _length = length;
+ if ((ind < count)
+ || (totalLength != ((IOByteCount) totalLength))) return (false); /* overflow */
+
+ _length = totalLength;
_pages = pages;
_rangesCount = count;
_wireCount++; // Physical MDs are, by definition, wired
else { /* kIOMemoryTypeVirtual | kIOMemoryTypeVirtual64 | kIOMemoryTypeUIO */
ioGMDData *dataP;
- unsigned dataSize = computeDataSize(_pages, /* upls */ count * 2);
+ unsigned dataSize;
- if (!_memoryEntries) {
- _memoryEntries = OSData::withCapacity(dataSize);
- if (!_memoryEntries)
- return false;
- }
- else if (!_memoryEntries->initWithCapacity(dataSize))
- return false;
-
- _memoryEntries->appendBytes(0, sizeof(ioGMDData));
+ if (_pages > atop_64(max_mem)) return false;
+
+ dataSize = computeDataSize(_pages, /* upls */ count * 2);
+ if (!initMemoryEntries(dataSize, mapper)) return false;
dataP = getDataP(_memoryEntries);
- dataP->fMapper = mapper;
dataP->fPageCnt = _pages;
- if ( (kIOMemoryPersistent & _flags) && !_memEntry)
- _memEntry = createNamedEntry();
+ if ( (kIOMemoryPersistent & _flags) && !_memRef)
+ {
+ IOReturn
+ err = memoryReferenceCreate(0, &_memRef);
+ if (kIOReturnSuccess != err) return false;
+ }
if ((_flags & kIOMemoryAutoPrepare)
&& prepare() != kIOReturnSuccess)
if( reserved)
{
LOCK;
- reserved->memory = 0;
+ reserved->dp.memory = 0;
UNLOCK;
}
-
- if ((kIOMemoryTypePhysical != type) && (kIOMemoryTypePhysical64 != type))
+ if ((kIOMemoryTypePhysical == type) || (kIOMemoryTypePhysical64 == type))
{
- while (_wireCount)
- complete();
+ ioGMDData * dataP;
+ if (_memoryEntries && (dataP = getDataP(_memoryEntries)) && dataP->fMappedBase)
+ {
+ dataP->fMapper->iovmUnmapMemory(this, NULL, dataP->fMappedBase, dataP->fMappedLength);
+ dataP->fMappedBase = 0;
+ }
+ }
+ else
+ {
+ while (_wireCount) complete();
}
- if (_memoryEntries)
- _memoryEntries->release();
- if (_ranges.v && _rangesIsAllocated)
+ if (_memoryEntries) _memoryEntries->release();
+
+ if (_ranges.v && !(kIOMemoryAsReference & _flags))
{
if (kIOMemoryTypeUIO == type)
uio_free((uio_t) _ranges.v);
+#ifndef __LP64__
else if ((kIOMemoryTypeVirtual64 == type) || (kIOMemoryTypePhysical64 == type))
IODelete(_ranges.v64, IOAddressRange, _rangesCount);
+#endif /* !__LP64__ */
else
IODelete(_ranges.v, IOVirtualRange, _rangesCount);
_ranges.v = NULL;
}
- if (reserved && reserved->devicePager)
- device_pager_deallocate( (memory_object_t) reserved->devicePager );
-
- // memEntry holds a ref on the device pager which owns reserved
- // (ExpansionData) so no reserved access after this point
- if (_memEntry)
- ipc_port_release_send( (ipc_port_t) _memEntry );
+ if (reserved)
+ {
+ if (reserved->dp.devicePager)
+ {
+ // memEntry holds a ref on the device pager which owns reserved
+ // (IOMemoryDescriptorReserved) so no reserved access after this point
+ device_pager_deallocate( (memory_object_t) reserved->dp.devicePager );
+ }
+ else
+ IODelete(reserved, IOMemoryDescriptorReserved, 1);
+ reserved = NULL;
+ }
- if (_prepareLock)
- IOLockFree(_prepareLock);
+ if (_memRef) memoryReferenceRelease(_memRef);
+ if (_prepareLock) IOLockFree(_prepareLock);
super::free();
}
-/* DEPRECATED */ void IOGeneralMemoryDescriptor::unmapFromKernel()
-/* DEPRECATED */ {
- panic("IOGMD::unmapFromKernel deprecated");
-/* DEPRECATED */ }
-/* DEPRECATED */
-/* DEPRECATED */ void IOGeneralMemoryDescriptor::mapIntoKernel(unsigned rangeIndex)
-/* DEPRECATED */ {
- panic("IOGMD::mapIntoKernel deprecated");
-/* DEPRECATED */ }
+#ifndef __LP64__
+void IOGeneralMemoryDescriptor::unmapFromKernel()
+{
+ panic("IOGMD::unmapFromKernel deprecated");
+}
+
+void IOGeneralMemoryDescriptor::mapIntoKernel(unsigned rangeIndex)
+{
+ panic("IOGMD::mapIntoKernel deprecated");
+}
+#endif /* !__LP64__ */
/*
* getDirection:
*/
IODirection IOMemoryDescriptor::getDirection() const
{
- return _direction;
+#ifndef __LP64__
+ if (_direction)
+ return _direction;
+#endif /* !__LP64__ */
+ return (IODirection) (_flags & kIOMemoryDirectionMask);
}
/*
return( _tag);
}
+#ifndef __LP64__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+
// @@@ gvdl: who is using this API? Seems like a wierd thing to implement.
IOPhysicalAddress
IOMemoryDescriptor::getSourceSegment( IOByteCount offset, IOByteCount * length )
return( (IOPhysicalAddress) physAddr ); // truncated but only page offset is used
}
+#pragma clang diagnostic pop
+
+#endif /* !__LP64__ */
+
IOByteCount IOMemoryDescriptor::readBytes
(IOByteCount offset, void *bytes, IOByteCount length)
{
- addr64_t dstAddr = (addr64_t) (UInt32) bytes;
+ addr64_t dstAddr = CAST_DOWN(addr64_t, bytes);
IOByteCount remaining;
// Assert that this entire I/O is withing the available range
- assert(offset < _length);
+ assert(offset <= _length);
assert(offset + length <= _length);
- if (offset >= _length) {
+ if ((offset >= _length)
+ || ((offset + length) > _length)) {
return 0;
}
+ if (kIOMemoryThreadSafe & _flags)
+ LOCK;
+
remaining = length = min(length, _length - offset);
while (remaining) { // (process another target segment?)
addr64_t srcAddr64;
IOByteCount srcLen;
- srcAddr64 = getPhysicalSegment64(offset, &srcLen);
+ srcAddr64 = getPhysicalSegment(offset, &srcLen, kIOMemoryMapperNone);
if (!srcAddr64)
break;
remaining -= srcLen;
}
+ if (kIOMemoryThreadSafe & _flags)
+ UNLOCK;
+
assert(!remaining);
return length - remaining;
}
IOByteCount IOMemoryDescriptor::writeBytes
- (IOByteCount offset, const void *bytes, IOByteCount length)
+ (IOByteCount inoffset, const void *bytes, IOByteCount length)
{
- addr64_t srcAddr = (addr64_t) (UInt32) bytes;
+ addr64_t srcAddr = CAST_DOWN(addr64_t, bytes);
IOByteCount remaining;
+ IOByteCount offset = inoffset;
// Assert that this entire I/O is withing the available range
- assert(offset < _length);
+ assert(offset <= _length);
assert(offset + length <= _length);
assert( !(kIOMemoryPreparedReadOnly & _flags) );
- if ( (kIOMemoryPreparedReadOnly & _flags) || offset >= _length) {
+ if ( (kIOMemoryPreparedReadOnly & _flags)
+ || (offset >= _length)
+ || ((offset + length) > _length)) {
return 0;
}
+ if (kIOMemoryThreadSafe & _flags)
+ LOCK;
+
remaining = length = min(length, _length - offset);
while (remaining) { // (process another target segment?)
addr64_t dstAddr64;
IOByteCount dstLen;
- dstAddr64 = getPhysicalSegment64(offset, &dstLen);
+ dstAddr64 = getPhysicalSegment(offset, &dstLen, kIOMemoryMapperNone);
if (!dstAddr64)
break;
if (dstLen > remaining)
dstLen = remaining;
- copypv(srcAddr, (addr64_t) dstAddr64, dstLen,
- cppvPsnk | cppvFsnk | cppvNoRefSrc | cppvNoModSnk | cppvKmap);
-
- srcAddr += dstLen;
+ if (!srcAddr) bzero_phys(dstAddr64, dstLen);
+ else
+ {
+ copypv(srcAddr, (addr64_t) dstAddr64, dstLen,
+ cppvPsnk | cppvFsnk | cppvNoRefSrc | cppvNoModSnk | cppvKmap);
+ srcAddr += dstLen;
+ }
offset += dstLen;
remaining -= dstLen;
}
+ if (kIOMemoryThreadSafe & _flags)
+ UNLOCK;
+
assert(!remaining);
+ if (!srcAddr) performOperation(kIOMemoryIncoherentIOFlush, inoffset, length);
+
return length - remaining;
}
-// osfmk/device/iokit_rpc.c
-extern "C" unsigned int IODefaultCacheBits(addr64_t pa);
+#ifndef __LP64__
+void IOGeneralMemoryDescriptor::setPosition(IOByteCount position)
+{
+ panic("IOGMD::setPosition deprecated");
+}
+#endif /* !__LP64__ */
+
+static volatile SInt64 gIOMDPreparationID __attribute__((aligned(8))) = (1ULL << 32);
+
+uint64_t
+IOGeneralMemoryDescriptor::getPreparationID( void )
+{
+ ioGMDData *dataP;
+
+ if (!_wireCount)
+ return (kIOPreparationIDUnprepared);
-/* DEPRECATED */ void IOGeneralMemoryDescriptor::setPosition(IOByteCount position)
-/* DEPRECATED */ {
- panic("IOGMD::setPosition deprecated");
-/* DEPRECATED */ }
+ if (((kIOMemoryTypeMask & _flags) == kIOMemoryTypePhysical)
+ || ((kIOMemoryTypeMask & _flags) == kIOMemoryTypePhysical64))
+ {
+ IOMemoryDescriptor::setPreparationID();
+ return (IOMemoryDescriptor::getPreparationID());
+ }
+
+ if (!_memoryEntries || !(dataP = getDataP(_memoryEntries)))
+ return (kIOPreparationIDUnprepared);
+
+ if (kIOPreparationIDUnprepared == dataP->fPreparationID)
+ {
+ dataP->fPreparationID = OSIncrementAtomic64(&gIOMDPreparationID);
+ }
+ return (dataP->fPreparationID);
+}
+
+IOMemoryDescriptorReserved * IOMemoryDescriptor::getKernelReserved( void )
+{
+ if (!reserved)
+ {
+ reserved = IONew(IOMemoryDescriptorReserved, 1);
+ if (reserved)
+ bzero(reserved, sizeof(IOMemoryDescriptorReserved));
+ }
+ return (reserved);
+}
+
+void IOMemoryDescriptor::setPreparationID( void )
+{
+ if (getKernelReserved() && (kIOPreparationIDUnprepared == reserved->preparationID))
+ {
+ reserved->preparationID = OSIncrementAtomic64(&gIOMDPreparationID);
+ }
+}
+
+uint64_t IOMemoryDescriptor::getPreparationID( void )
+{
+ if (reserved)
+ return (reserved->preparationID);
+ else
+ return (kIOPreparationIDUnsupported);
+}
+
+void IOMemoryDescriptor::setVMTags(vm_tag_t kernelTag, vm_tag_t userTag)
+{
+ if (!getKernelReserved()) return;
+ reserved->kernelTag = kernelTag;
+ reserved->userTag = userTag;
+}
+
+vm_tag_t IOMemoryDescriptor::getVMTag(vm_map_t map)
+{
+ if (!reserved
+ || (VM_KERN_MEMORY_NONE == reserved->kernelTag)
+ || (VM_KERN_MEMORY_NONE == reserved->userTag))
+ {
+ return (IOMemoryTag(map));
+ }
+
+ if (vm_kernel_map_is_kernel(map)) return (reserved->kernelTag);
+ return (reserved->userTag);
+}
IOReturn IOGeneralMemoryDescriptor::dmaCommandOperation(DMACommandOps op, void *vData, UInt dataSize) const
{
+ IOReturn err = kIOReturnSuccess;
+ DMACommandOps params;
+ IOGeneralMemoryDescriptor * md = const_cast<IOGeneralMemoryDescriptor *>(this);
+ ioGMDData *dataP;
+
+ params = (op & ~kIOMDDMACommandOperationMask & op);
+ op &= kIOMDDMACommandOperationMask;
+
+ if (kIOMDDMAMap == op)
+ {
+ if (dataSize < sizeof(IOMDDMAMapArgs))
+ return kIOReturnUnderrun;
+
+ IOMDDMAMapArgs * data = (IOMDDMAMapArgs *) vData;
+
+ if (!_memoryEntries
+ && !md->initMemoryEntries(computeDataSize(0, 0), kIOMapperWaitSystem)) return (kIOReturnNoMemory);
+
+ if (_memoryEntries && data->fMapper)
+ {
+ bool remap, keepMap;
+ dataP = getDataP(_memoryEntries);
+
+ if (data->fMapSpec.numAddressBits < dataP->fDMAMapNumAddressBits) dataP->fDMAMapNumAddressBits = data->fMapSpec.numAddressBits;
+ if (data->fMapSpec.alignment > dataP->fDMAMapAlignment) dataP->fDMAMapAlignment = data->fMapSpec.alignment;
+
+ keepMap = (data->fMapper == gIOSystemMapper);
+ keepMap &= ((data->fOffset == 0) && (data->fLength == _length));
+
+ remap = (!keepMap);
+ remap |= (dataP->fDMAMapNumAddressBits < 64)
+ && ((dataP->fMappedBase + _length) > (1ULL << dataP->fDMAMapNumAddressBits));
+ remap |= (dataP->fDMAMapAlignment > page_size);
+
+ if (remap || !dataP->fMappedBase)
+ {
+// if (dataP->fMappedBase) OSReportWithBacktrace("kIOMDDMAMap whole %d remap %d params %d\n", whole, remap, params);
+ err = md->dmaMap(data->fMapper, data->fCommand, &data->fMapSpec, data->fOffset, data->fLength, &data->fAlloc, &data->fAllocLength);
+ if (keepMap && (kIOReturnSuccess == err) && !dataP->fMappedBase)
+ {
+ dataP->fMappedBase = data->fAlloc;
+ dataP->fMappedLength = data->fAllocLength;
+ data->fAllocLength = 0; // IOMD owns the alloc now
+ }
+ }
+ else
+ {
+ data->fAlloc = dataP->fMappedBase;
+ data->fAllocLength = 0; // give out IOMD map
+ }
+ data->fMapContig = !dataP->fDiscontig;
+ }
+
+ return (err);
+ }
+
+ if (kIOMDAddDMAMapSpec == op)
+ {
+ if (dataSize < sizeof(IODMAMapSpecification))
+ return kIOReturnUnderrun;
+
+ IODMAMapSpecification * data = (IODMAMapSpecification *) vData;
+
+ if (!_memoryEntries
+ && !md->initMemoryEntries(computeDataSize(0, 0), kIOMapperWaitSystem)) return (kIOReturnNoMemory);
+
+ if (_memoryEntries)
+ {
+ dataP = getDataP(_memoryEntries);
+ if (data->numAddressBits < dataP->fDMAMapNumAddressBits)
+ dataP->fDMAMapNumAddressBits = data->numAddressBits;
+ if (data->alignment > dataP->fDMAMapAlignment)
+ dataP->fDMAMapAlignment = data->alignment;
+ }
+ return kIOReturnSuccess;
+ }
+
if (kIOMDGetCharacteristics == op) {
if (dataSize < sizeof(IOMDDMACharacteristics))
data->fLength = _length;
data->fSGCount = _rangesCount;
data->fPages = _pages;
- data->fDirection = _direction;
+ data->fDirection = getDirection();
if (!_wireCount)
data->fIsPrepared = false;
else {
data->fIsPrepared = true;
data->fHighestPage = _highestPage;
- if (_memoryEntries) {
- ioGMDData *gmdData = getDataP(_memoryEntries);
- ioPLBlock *ioplList = getIOPLList(gmdData);
- UInt count = getNumIOPL(_memoryEntries, gmdData);
-
- data->fIsMapped = (gmdData->fMapper && _pages && (count > 0)
- && ioplList[0].fMappedBase);
+ if (_memoryEntries)
+ {
+ dataP = getDataP(_memoryEntries);
+ ioPLBlock *ioplList = getIOPLList(dataP);
+ UInt count = getNumIOPL(_memoryEntries, dataP);
if (count == 1)
data->fPageAlign = (ioplList[0].fPageOffset & PAGE_MASK) | ~PAGE_MASK;
}
- else
- data->fIsMapped = false;
}
return kIOReturnSuccess;
- }
- else if (!(kIOMDWalkSegments & op))
+
+ } else if (kIOMDWalkSegments != op)
return kIOReturnBadArgument;
// Get the next segment
UInt offset = isP->fIO.fOffset;
bool mapped = isP->fIO.fMapped;
+ if (IOMapper::gSystem && mapped
+ && (!(kIOMemoryHostOnly & _flags))
+ && (!_memoryEntries || !getDataP(_memoryEntries)->fMappedBase))
+// && (_memoryEntries && !getDataP(_memoryEntries)->fMappedBase))
+ {
+ if (!_memoryEntries
+ && !md->initMemoryEntries(computeDataSize(0, 0), kIOMapperWaitSystem)) return (kIOReturnNoMemory);
+
+ dataP = getDataP(_memoryEntries);
+ if (dataP->fMapper)
+ {
+ IODMAMapSpecification mapSpec;
+ bzero(&mapSpec, sizeof(mapSpec));
+ mapSpec.numAddressBits = dataP->fDMAMapNumAddressBits;
+ mapSpec.alignment = dataP->fDMAMapAlignment;
+ err = md->dmaMap(dataP->fMapper, NULL, &mapSpec, 0, _length, &dataP->fMappedBase, &dataP->fMappedLength);
+ if (kIOReturnSuccess != err) return (err);
+ }
+ }
+
if (offset >= _length)
return (offset == _length)? kIOReturnOverrun : kIOReturnInternalError;
// Validate the previous offset
UInt ind, off2Ind = isP->fOffset2Index;
- if ((kIOMDFirstSegment != op)
+ if (!params
&& offset
&& (offset == isP->fNextOffset || off2Ind <= offset))
ind = isP->fIndex;
UInt length;
UInt64 address;
+
+
if ( (_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical) {
// Physical address based memory descriptor
const IOPhysicalRange *physP = (IOPhysicalRange *) &_ranges.p[0];
// Find the range after the one that contains the offset
- UInt len;
+ mach_vm_size_t len;
for (len = 0; off2Ind <= offset; ind++) {
len = physP[ind].length;
off2Ind += len;
length = off2Ind - offset;
address = physP[ind - 1].address + len - length;
- // see how far we can coalesce ranges
- while (ind < _rangesCount && address + length == physP[ind].address) {
- len = physP[ind].length;
- length += len;
- off2Ind += len;
- ind++;
+ if (true && mapped && _memoryEntries
+ && (dataP = getDataP(_memoryEntries)) && dataP->fMappedBase)
+ {
+ address = dataP->fMappedBase + offset;
+ }
+ else
+ {
+ // see how far we can coalesce ranges
+ while (ind < _rangesCount && address + length == physP[ind].address) {
+ len = physP[ind].length;
+ length += len;
+ off2Ind += len;
+ ind++;
+ }
}
// correct contiguous check overshoot
ind--;
off2Ind -= len;
}
+#ifndef __LP64__
else if ( (_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical64) {
// Physical address based memory descriptor
length = off2Ind - offset;
address = physP[ind - 1].address + len - length;
- // see how far we can coalesce ranges
- while (ind < _rangesCount && address + length == physP[ind].address) {
- len = physP[ind].length;
- length += len;
- off2Ind += len;
- ind++;
+ if (true && mapped && _memoryEntries
+ && (dataP = getDataP(_memoryEntries)) && dataP->fMappedBase)
+ {
+ address = dataP->fMappedBase + offset;
+ }
+ else
+ {
+ // see how far we can coalesce ranges
+ while (ind < _rangesCount && address + length == physP[ind].address) {
+ len = physP[ind].length;
+ length += len;
+ off2Ind += len;
+ ind++;
+ }
}
-
// correct contiguous check overshoot
ind--;
off2Ind -= len;
- }
+ }
+#endif /* !__LP64__ */
else do {
if (!_wireCount)
panic("IOGMD: not wired for the IODMACommand");
assert(_memoryEntries);
- ioGMDData * dataP = getDataP(_memoryEntries);
+ dataP = getDataP(_memoryEntries);
const ioPLBlock *ioplList = getIOPLList(dataP);
UInt numIOPLs = getNumIOPL(_memoryEntries, dataP);
upl_page_info_t *pageList = getPageList(dataP);
// If a mapped address is requested and this is a pre-mapped IOPL
// then just need to compute an offset relative to the mapped base.
- if (mapped && ioplInfo.fMappedBase) {
+ if (mapped && dataP->fMappedBase) {
offset += (ioplInfo.fPageOffset & PAGE_MASK);
- address = ptoa_64(ioplInfo.fMappedBase) + offset;
+ address = trunc_page_64(dataP->fMappedBase) + ptoa_64(ioplInfo.fMappedPage) + offset;
continue; // Done leave do/while(false) now
}
// Compute the starting address of this segment
IOPhysicalAddress pageAddr = pageList[pageInd].phys_addr;
+ if (!pageAddr) {
+ panic("!pageList phys_addr");
+ }
+
address = ptoa_64(pageAddr) + offset;
// length is currently set to the length of the remainider of the iopl.
}
addr64_t
-IOGeneralMemoryDescriptor::getPhysicalSegment64(IOByteCount offset, IOByteCount *lengthOfSegment)
+IOGeneralMemoryDescriptor::getPhysicalSegment(IOByteCount offset, IOByteCount *lengthOfSegment, IOOptionBits options)
{
- IOReturn ret;
- IOByteCount length = 0;
- addr64_t address = 0;
+ IOReturn ret;
+ mach_vm_address_t address = 0;
+ mach_vm_size_t length = 0;
+ IOMapper * mapper = gIOSystemMapper;
+ IOOptionBits type = _flags & kIOMemoryTypeMask;
+
+ if (lengthOfSegment)
+ *lengthOfSegment = 0;
+
+ if (offset >= _length)
+ return 0;
+
+ // IOMemoryDescriptor::doMap() cannot use getPhysicalSegment() to obtain the page offset, since it must
+ // support the unwired memory case in IOGeneralMemoryDescriptor, and hibernate_write_image() cannot use
+ // map()->getVirtualAddress() to obtain the kernel pointer, since it must prevent the memory allocation
+ // due to IOMemoryMap, so _kIOMemorySourceSegment is a necessary evil until all of this gets cleaned up
+
+ if ((options & _kIOMemorySourceSegment) && (kIOMemoryTypeUPL != type))
+ {
+ unsigned rangesIndex = 0;
+ Ranges vec = _ranges;
+ mach_vm_address_t addr;
+
+ // Find starting address within the vector of ranges
+ for (;;) {
+ getAddrLenForInd(addr, length, type, vec, rangesIndex);
+ if (offset < length)
+ break;
+ offset -= length; // (make offset relative)
+ rangesIndex++;
+ }
+
+ // Now that we have the starting range,
+ // lets find the last contiguous range
+ addr += offset;
+ length -= offset;
- if (gIOSystemMapper && (kIOMemoryTypePhysical == (_flags & kIOMemoryTypeMask)))
- return (super::getPhysicalSegment64(offset, lengthOfSegment));
+ for ( ++rangesIndex; rangesIndex < _rangesCount; rangesIndex++ ) {
+ mach_vm_address_t newAddr;
+ mach_vm_size_t newLen;
- if (offset < _length) // (within bounds?)
+ getAddrLenForInd(newAddr, newLen, type, vec, rangesIndex);
+ if (addr + length != newAddr)
+ break;
+ length += newLen;
+ }
+ if (addr)
+ address = (IOPhysicalAddress) addr; // Truncate address to 32bit
+ }
+ else
{
IOMDDMAWalkSegmentState _state;
- IOMDDMAWalkSegmentArgs * state = (IOMDDMAWalkSegmentArgs *) &_state;
+ IOMDDMAWalkSegmentArgs * state = (IOMDDMAWalkSegmentArgs *) (void *)&_state;
state->fOffset = offset;
state->fLength = _length - offset;
- state->fMapped = false;
+ state->fMapped = (0 == (options & kIOMemoryMapperNone)) && !(_flags & kIOMemoryHostOnly);
ret = dmaCommandOperation(kIOMDFirstSegment, _state, sizeof(_state));
if ((kIOReturnSuccess != ret) && (kIOReturnOverrun != ret))
- DEBG("getPhysicalSegment64 dmaCommandOperation(%lx), %p, offset %qx, addr %qx, len %qx\n",
+ DEBG("getPhysicalSegment dmaCommandOperation(%lx), %p, offset %qx, addr %qx, len %qx\n",
ret, this, state->fOffset,
state->fIOVMAddr, state->fLength);
if (kIOReturnSuccess == ret)
address = state->fIOVMAddr;
length = state->fLength;
}
- if (!address)
- length = 0;
+
+ // dmaCommandOperation() does not distinguish between "mapped" and "unmapped" physical memory, even
+ // with fMapped set correctly, so we must handle the transformation here until this gets cleaned up
+
+ if (mapper && ((kIOMemoryTypePhysical == type) || (kIOMemoryTypePhysical64 == type)))
+ {
+ if ((options & kIOMemoryMapperNone) && !(_flags & kIOMemoryMapperNone))
+ {
+ addr64_t origAddr = address;
+ IOByteCount origLen = length;
+
+ address = mapper->mapToPhysicalAddress(origAddr);
+ length = page_size - (address & (page_size - 1));
+ while ((length < origLen)
+ && ((address + length) == mapper->mapToPhysicalAddress(origAddr + length)))
+ length += page_size;
+ if (length > origLen)
+ length = origLen;
+ }
+ }
}
+ if (!address)
+ length = 0;
+
if (lengthOfSegment)
*lengthOfSegment = length;
return (address);
}
-IOPhysicalAddress
-IOGeneralMemoryDescriptor::getPhysicalSegment(IOByteCount offset, IOByteCount *lengthOfSegment)
-{
- IOReturn ret;
- IOByteCount length = 0;
- addr64_t address = 0;
+#ifndef __LP64__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
-// assert(offset <= _length);
+addr64_t
+IOMemoryDescriptor::getPhysicalSegment(IOByteCount offset, IOByteCount *lengthOfSegment, IOOptionBits options)
+{
+ addr64_t address = 0;
- if (offset < _length) // (within bounds?)
+ if (options & _kIOMemorySourceSegment)
{
- IOMDDMAWalkSegmentState _state;
- IOMDDMAWalkSegmentArgs * state = (IOMDDMAWalkSegmentArgs *) &_state;
+ address = getSourceSegment(offset, lengthOfSegment);
+ }
+ else if (options & kIOMemoryMapperNone)
+ {
+ address = getPhysicalSegment64(offset, lengthOfSegment);
+ }
+ else
+ {
+ address = getPhysicalSegment(offset, lengthOfSegment);
+ }
- state->fOffset = offset;
- state->fLength = _length - offset;
- state->fMapped = true;
+ return (address);
+}
+#pragma clang diagnostic pop
- ret = dmaCommandOperation(
- kIOMDFirstSegment, _state, sizeof(_state));
+addr64_t
+IOGeneralMemoryDescriptor::getPhysicalSegment64(IOByteCount offset, IOByteCount *lengthOfSegment)
+{
+ return (getPhysicalSegment(offset, lengthOfSegment, kIOMemoryMapperNone));
+}
- if ((kIOReturnSuccess != ret) && (kIOReturnOverrun != ret))
- DEBG("getPhysicalSegment dmaCommandOperation(%lx), %p, offset %qx, addr %qx, len %qx\n",
- ret, this, state->fOffset,
- state->fIOVMAddr, state->fLength);
- if (kIOReturnSuccess == ret)
- {
- address = state->fIOVMAddr;
- length = state->fLength;
- }
+IOPhysicalAddress
+IOGeneralMemoryDescriptor::getPhysicalSegment(IOByteCount offset, IOByteCount *lengthOfSegment)
+{
+ addr64_t address = 0;
+ IOByteCount length = 0;
- if (!address)
- length = 0;
- }
+ address = getPhysicalSegment(offset, lengthOfSegment, 0);
+
+ if (lengthOfSegment)
+ length = *lengthOfSegment;
if ((address + length) > 0x100000000ULL)
{
panic("getPhysicalSegment() out of 32b range 0x%qx, len 0x%lx, class %s",
- address, length, (getMetaClass())->getClassName());
+ address, (long) length, (getMetaClass())->getClassName());
}
- if (lengthOfSegment)
- *lengthOfSegment = length;
-
return ((IOPhysicalAddress) address);
}
{
IOByteCount origLen;
- phys64 = mapper->mapAddr(phys32);
+ phys64 = mapper->mapToPhysicalAddress(phys32);
origLen = *lengthOfSegment;
length = page_size - (phys64 & (page_size - 1));
while ((length < origLen)
- && ((phys64 + length) == mapper->mapAddr(phys32 + length)))
+ && ((phys64 + length) == mapper->mapToPhysicalAddress(phys32 + length)))
length += page_size;
if (length > origLen)
length = origLen;
else
phys64 = (addr64_t) phys32;
- return phys64;
-}
-
-IOPhysicalAddress
-IOGeneralMemoryDescriptor::getSourceSegment(IOByteCount offset, IOByteCount *lengthOfSegment)
-{
- IOPhysicalAddress address = 0;
- IOPhysicalLength length = 0;
- IOOptionBits type = _flags & kIOMemoryTypeMask;
-
- assert(offset <= _length);
-
- if ( type == kIOMemoryTypeUPL)
- return super::getSourceSegment( offset, lengthOfSegment );
- else if ( offset < _length ) // (within bounds?)
- {
- unsigned rangesIndex = 0;
- Ranges vec = _ranges;
- user_addr_t addr;
-
- // Find starting address within the vector of ranges
- for (;;) {
- getAddrLenForInd(addr, length, type, vec, rangesIndex);
- if (offset < length)
- break;
- offset -= length; // (make offset relative)
- rangesIndex++;
- }
-
- // Now that we have the starting range,
- // lets find the last contiguous range
- addr += offset;
- length -= offset;
-
- for ( ++rangesIndex; rangesIndex < _rangesCount; rangesIndex++ ) {
- user_addr_t newAddr;
- IOPhysicalLength newLen;
-
- getAddrLenForInd(newAddr, newLen, type, vec, rangesIndex);
- if (addr + length != newAddr)
- break;
- length += newLen;
- }
- if (addr)
- address = (IOPhysicalAddress) addr; // Truncate address to 32bit
- else
- length = 0;
- }
-
- if ( lengthOfSegment ) *lengthOfSegment = length;
+ return phys64;
+}
- return address;
+IOPhysicalAddress
+IOMemoryDescriptor::getPhysicalSegment(IOByteCount offset, IOByteCount *lengthOfSegment)
+{
+ return ((IOPhysicalAddress) getPhysicalSegment(offset, lengthOfSegment, 0));
}
-/* DEPRECATED */ /* USE INSTEAD: map(), readBytes(), writeBytes() */
-/* DEPRECATED */ void * IOGeneralMemoryDescriptor::getVirtualSegment(IOByteCount offset,
-/* DEPRECATED */ IOByteCount * lengthOfSegment)
-/* DEPRECATED */ {
- if (_task == kernel_task)
- return (void *) getSourceSegment(offset, lengthOfSegment);
- else
- panic("IOGMD::getVirtualSegment deprecated");
+IOPhysicalAddress
+IOGeneralMemoryDescriptor::getSourceSegment(IOByteCount offset, IOByteCount *lengthOfSegment)
+{
+ return ((IOPhysicalAddress) getPhysicalSegment(offset, lengthOfSegment, _kIOMemorySourceSegment));
+}
- return 0;
-/* DEPRECATED */ }
-/* DEPRECATED */ /* USE INSTEAD: map(), readBytes(), writeBytes() */
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+void * IOGeneralMemoryDescriptor::getVirtualSegment(IOByteCount offset,
+ IOByteCount * lengthOfSegment)
+{
+ if (_task == kernel_task)
+ return (void *) getSourceSegment(offset, lengthOfSegment);
+ else
+ panic("IOGMD::getVirtualSegment deprecated");
+ return 0;
+}
+#pragma clang diagnostic pop
+#endif /* !__LP64__ */
IOReturn
IOMemoryDescriptor::dmaCommandOperation(DMACommandOps op, void *vData, UInt dataSize) const
{
+ IOMemoryDescriptor *md = const_cast<IOMemoryDescriptor *>(this);
+ DMACommandOps params;
+ IOReturn err;
+
+ params = (op & ~kIOMDDMACommandOperationMask & op);
+ op &= kIOMDDMACommandOperationMask;
+
if (kIOMDGetCharacteristics == op) {
if (dataSize < sizeof(IOMDDMACharacteristics))
return kIOReturnUnderrun;
IOMDDMACharacteristics *data = (IOMDDMACharacteristics *) vData;
data->fLength = getLength();
data->fSGCount = 0;
- data->fDirection = _direction;
- if (IOMapper::gSystem)
- data->fIsMapped = true;
+ data->fDirection = getDirection();
data->fIsPrepared = true; // Assume prepared - fails safe
}
- else if (kIOMDWalkSegments & op) {
+ else if (kIOMDWalkSegments == op) {
if (dataSize < sizeof(IOMDDMAWalkSegmentArgs))
return kIOReturnUnderrun;
IOByteCount offset = (IOByteCount) data->fOffset;
IOPhysicalLength length;
- IOMemoryDescriptor *ncmd = const_cast<IOMemoryDescriptor *>(this);
if (data->fMapped && IOMapper::gSystem)
- data->fIOVMAddr = ncmd->getPhysicalSegment(offset, &length);
+ data->fIOVMAddr = md->getPhysicalSegment(offset, &length);
else
- data->fIOVMAddr = ncmd->getPhysicalSegment64(offset, &length);
+ data->fIOVMAddr = md->getPhysicalSegment(offset, &length, kIOMemoryMapperNone);
data->fLength = length;
}
- else
- return kIOReturnBadArgument;
+ else if (kIOMDAddDMAMapSpec == op) return kIOReturnUnsupported;
+ else if (kIOMDDMAMap == op)
+ {
+ if (dataSize < sizeof(IOMDDMAMapArgs))
+ return kIOReturnUnderrun;
+ IOMDDMAMapArgs * data = (IOMDDMAMapArgs *) vData;
+
+ if (params) panic("class %s does not support IODMACommand::kIterateOnly", getMetaClass()->getClassName());
+
+ data->fMapContig = true;
+ err = md->dmaMap(data->fMapper, data->fCommand, &data->fMapSpec, data->fOffset, data->fLength, &data->fAlloc, &data->fAllocLength);
+ return (err);
+ }
+ else return kIOReturnBadArgument;
return kIOReturnSuccess;
}
-IOReturn IOMemoryDescriptor::setPurgeable( IOOptionBits newState,
- IOOptionBits * oldState )
+IOReturn
+IOGeneralMemoryDescriptor::setPurgeable( IOOptionBits newState,
+ IOOptionBits * oldState )
{
IOReturn err = kIOReturnSuccess;
+
vm_purgable_t control;
int state;
- do
+ if (_memRef)
{
- if (!_memEntry)
- {
- err = kIOReturnNotReady;
- break;
- }
+ err = super::setPurgeable(newState, oldState);
+ }
+ else
+ {
+ if (kIOMemoryThreadSafe & _flags)
+ LOCK;
+ do
+ {
+ // Find the appropriate vm_map for the given task
+ vm_map_t curMap;
+ if (_task == kernel_task && (kIOMemoryBufferPageable & _flags))
+ {
+ err = kIOReturnNotReady;
+ break;
+ }
+ else if (!_task)
+ {
+ err = kIOReturnUnsupported;
+ break;
+ }
+ else
+ curMap = get_task_map(_task);
- control = VM_PURGABLE_SET_STATE;
- switch (newState)
- {
- case kIOMemoryPurgeableKeepCurrent:
- control = VM_PURGABLE_GET_STATE;
- break;
+ // can only do one range
+ Ranges vec = _ranges;
+ IOOptionBits type = _flags & kIOMemoryTypeMask;
+ mach_vm_address_t addr;
+ mach_vm_size_t len;
+ getAddrLenForInd(addr, len, type, vec, 0);
- case kIOMemoryPurgeableNonVolatile:
- state = VM_PURGABLE_NONVOLATILE;
- break;
- case kIOMemoryPurgeableVolatile:
- state = VM_PURGABLE_VOLATILE;
- break;
- case kIOMemoryPurgeableEmpty:
- state = VM_PURGABLE_EMPTY;
- break;
- default:
- err = kIOReturnBadArgument;
- break;
- }
+ err = purgeableControlBits(newState, &control, &state);
+ if (kIOReturnSuccess != err)
+ break;
+ err = mach_vm_purgable_control(curMap, addr, control, &state);
+ if (oldState)
+ {
+ if (kIOReturnSuccess == err)
+ {
+ err = purgeableStateBits(&state);
+ *oldState = state;
+ }
+ }
+ }
+ while (false);
+ if (kIOMemoryThreadSafe & _flags)
+ UNLOCK;
+ }
- if (kIOReturnSuccess != err)
- break;
+ return (err);
+}
+
+IOReturn IOMemoryDescriptor::setPurgeable( IOOptionBits newState,
+ IOOptionBits * oldState )
+{
+ IOReturn err = kIOReturnNotReady;
- err = mach_memory_entry_purgable_control((ipc_port_t) _memEntry, control, &state);
+ if (kIOMemoryThreadSafe & _flags) LOCK;
+ if (_memRef) err = IOGeneralMemoryDescriptor::memoryReferenceSetPurgeable(_memRef, newState, oldState);
+ if (kIOMemoryThreadSafe & _flags) UNLOCK;
- if (oldState)
- {
- if (kIOReturnSuccess == err)
- {
- switch (state)
- {
- case VM_PURGABLE_NONVOLATILE:
- state = kIOMemoryPurgeableNonVolatile;
- break;
- case VM_PURGABLE_VOLATILE:
- state = kIOMemoryPurgeableVolatile;
- break;
- case VM_PURGABLE_EMPTY:
- state = kIOMemoryPurgeableEmpty;
- break;
- default:
- state = kIOMemoryPurgeableNonVolatile;
- err = kIOReturnNotReady;
- break;
- }
- *oldState = state;
- }
- }
+ return (err);
+}
+
+IOReturn IOMemoryDescriptor::getPageCounts( IOByteCount * residentPageCount,
+ IOByteCount * dirtyPageCount )
+{
+ IOReturn err = kIOReturnNotReady;
+
+ if (kIOMemoryThreadSafe & _flags) LOCK;
+ if (_memRef) err = IOGeneralMemoryDescriptor::memoryReferenceGetPageCounts(_memRef, residentPageCount, dirtyPageCount);
+ else
+ {
+ IOMultiMemoryDescriptor * mmd;
+ IOSubMemoryDescriptor * smd;
+ if ((smd = OSDynamicCast(IOSubMemoryDescriptor, this)))
+ {
+ err = smd->getPageCounts(residentPageCount, dirtyPageCount);
+ }
+ else if ((mmd = OSDynamicCast(IOMultiMemoryDescriptor, this)))
+ {
+ err = mmd->getPageCounts(residentPageCount, dirtyPageCount);
+ }
}
- while (false);
+ if (kIOMemoryThreadSafe & _flags) UNLOCK;
return (err);
}
+
extern "C" void dcache_incoherent_io_flush64(addr64_t pa, unsigned int count);
extern "C" void dcache_incoherent_io_store64(addr64_t pa, unsigned int count);
+static void SetEncryptOp(addr64_t pa, unsigned int count)
+{
+ ppnum_t page, end;
+
+ page = atop_64(round_page_64(pa));
+ end = atop_64(trunc_page_64(pa + count));
+ for (; page < end; page++)
+ {
+ pmap_clear_noencrypt(page);
+ }
+}
+
+static void ClearEncryptOp(addr64_t pa, unsigned int count)
+{
+ ppnum_t page, end;
+
+ page = atop_64(round_page_64(pa));
+ end = atop_64(trunc_page_64(pa + count));
+ for (; page < end; page++)
+ {
+ pmap_set_noencrypt(page);
+ }
+}
+
IOReturn IOMemoryDescriptor::performOperation( IOOptionBits options,
IOByteCount offset, IOByteCount length )
{
IOByteCount remaining;
+ unsigned int res;
void (*func)(addr64_t pa, unsigned int count) = 0;
switch (options)
case kIOMemoryIncoherentIOStore:
func = &dcache_incoherent_io_store64;
break;
+
+ case kIOMemorySetEncrypted:
+ func = &SetEncryptOp;
+ break;
+ case kIOMemoryClearEncrypted:
+ func = &ClearEncryptOp;
+ break;
}
if (!func)
return (kIOReturnUnsupported);
+ if (kIOMemoryThreadSafe & _flags)
+ LOCK;
+
+ res = 0x0UL;
remaining = length = min(length, getLength() - offset);
while (remaining)
// (process another target segment?)
addr64_t dstAddr64;
IOByteCount dstLen;
- dstAddr64 = getPhysicalSegment64(offset, &dstLen);
+ dstAddr64 = getPhysicalSegment(offset, &dstLen, kIOMemoryMapperNone);
if (!dstAddr64)
break;
remaining -= dstLen;
}
+ if (kIOMemoryThreadSafe & _flags)
+ UNLOCK;
+
return (remaining ? kIOReturnUnderrun : kIOReturnSuccess);
}
-#if defined(__ppc__) || defined(__arm__)
-extern vm_offset_t static_memory_end;
-#define io_kernel_static_end static_memory_end
+/*
+ *
+ */
+
+#if defined(__i386__) || defined(__x86_64__)
+
+#define io_kernel_static_start vm_kernel_stext
+#define io_kernel_static_end vm_kernel_etext
+
#else
-extern vm_offset_t first_avail;
-#define io_kernel_static_end first_avail
+#error io_kernel_static_end is undefined for this architecture
#endif
static kern_return_t
io_get_kernel_static_upl(
vm_map_t /* map */,
- vm_address_t offset,
- vm_size_t *upl_size,
+ uintptr_t offset,
+ upl_size_t *upl_size,
upl_t *upl,
upl_page_info_array_t page_list,
unsigned int *count,
if (!phys)
break;
page_list[page].phys_addr = phys;
- page_list[page].pageout = 0;
+ page_list[page].free_when_done = 0;
page_list[page].absent = 0;
page_list[page].dirty = 0;
page_list[page].precious = 0;
page_list[page].device = 0;
if (phys > highestPage)
- highestPage = page;
+ highestPage = phys;
}
*highest_page = highestPage;
return ((page >= pageCount) ? kIOReturnSuccess : kIOReturnVMError);
}
+/*
+ *
+ */
+#if IOTRACKING
+static void
+IOMemoryDescriptorUpdateWireOwner(ioGMDData * dataP, OSData * memoryEntries, vm_tag_t tag)
+{
+ ioPLBlock *ioplList;
+ UInt ind, count;
+ vm_tag_t prior;
+
+ count = getNumIOPL(memoryEntries, dataP);
+ if (!count) return;
+ ioplList = getIOPLList(dataP);
+
+ if (VM_KERN_MEMORY_NONE == tag) tag = dataP->fAllocTag;
+ assert(VM_KERN_MEMORY_NONE != tag);
+
+ for (ind = 0; ind < count; ind++)
+ {
+ if (!ioplList[ind].fIOPL) continue;
+ prior = iopl_set_tag(ioplList[ind].fIOPL, tag);
+ if (VM_KERN_MEMORY_NONE == dataP->fAllocTag) dataP->fAllocTag = prior;
+#if 0
+ if (tag != prior)
+ {
+ char name[2][48];
+ vm_tag_get_kext(prior, &name[0][0], sizeof(name[0]));
+ vm_tag_get_kext(tag, &name[1][0], sizeof(name[1]));
+ IOLog("switched %48s to %48s\n", name[0], name[1]);
+ }
+#endif
+ }
+}
+#endif /* IOTRACKING */
+
+
IOReturn IOGeneralMemoryDescriptor::wireVirtual(IODirection forDirection)
{
IOOptionBits type = _flags & kIOMemoryTypeMask;
- IOReturn error = kIOReturnCannotWire;
+ IOReturn error = kIOReturnSuccess;
ioGMDData *dataP;
- ppnum_t mapBase = 0;
- IOMapper *mapper;
- ipc_port_t sharedMem = (ipc_port_t) _memEntry;
+ upl_page_info_array_t pageInfo;
+ ppnum_t mapBase;
- assert(!_wireCount);
assert(kIOMemoryTypeVirtual == type || kIOMemoryTypeVirtual64 == type || kIOMemoryTypeUIO == type);
- if (_pages >= gIOMaximumMappedIOPageCount)
- return kIOReturnNoResources;
-
- dataP = getDataP(_memoryEntries);
- mapper = dataP->fMapper;
- if (mapper && _pages)
- mapBase = mapper->iovmAlloc(_pages);
-
- // Note that appendBytes(NULL) zeros the data up to the
- // desired length.
- _memoryEntries->appendBytes(0, dataP->fPageCnt * sizeof(upl_page_info_t));
- dataP = 0; // May no longer be valid so lets not get tempted.
+ if ((kIODirectionOutIn & forDirection) == kIODirectionNone)
+ forDirection = (IODirection) (forDirection | getDirection());
- if (forDirection == kIODirectionNone)
- forDirection = _direction;
-
- int uplFlags; // This Mem Desc's default flags for upl creation
+ upl_control_flags_t uplFlags; // This Mem Desc's default flags for upl creation
switch (kIODirectionOutIn & forDirection)
{
case kIODirectionOut:
// Pages do not need to be marked as dirty on commit
uplFlags = UPL_COPYOUT_FROM;
- _flags |= kIOMemoryPreparedReadOnly;
break;
case kIODirectionIn:
uplFlags = 0; // i.e. ~UPL_COPYOUT_FROM
break;
}
- uplFlags |= UPL_SET_IO_WIRE | UPL_SET_LITE;
+ dataP = getDataP(_memoryEntries);
-#ifdef UPL_NEED_32BIT_ADDR
- if (kIODirectionPrepareToPhys32 & forDirection)
- uplFlags |= UPL_NEED_32BIT_ADDR;
-#endif
+ if (kIODirectionDMACommand & forDirection) assert(_wireCount);
- // Find the appropriate vm_map for the given task
- vm_map_t curMap;
- if (_task == kernel_task && (kIOMemoryBufferPageable & _flags))
- curMap = 0;
+ if (_wireCount)
+ {
+ if ((kIOMemoryPreparedReadOnly & _flags) && !(UPL_COPYOUT_FROM & uplFlags))
+ {
+ OSReportWithBacktrace("IOMemoryDescriptor 0x%lx prepared read only", VM_KERNEL_ADDRPERM(this));
+ error = kIOReturnNotWritable;
+ }
+ }
else
- { curMap = get_task_map(_task); }
+ {
+ IOMapper *mapper;
+ mapper = dataP->fMapper;
+ dataP->fMappedBase = 0;
- // Iterate over the vector of virtual ranges
- Ranges vec = _ranges;
- unsigned int pageIndex = 0;
- IOByteCount mdOffset = 0;
- ppnum_t highestPage = 0;
- for (UInt range = 0; range < _rangesCount; range++) {
- ioPLBlock iopl;
- user_addr_t startPage;
- IOByteCount numBytes;
- ppnum_t highPage = 0;
-
- // Get the startPage address and length of vec[range]
- getAddrLenForInd(startPage, numBytes, type, vec, range);
- iopl.fPageOffset = (short) startPage & PAGE_MASK;
- numBytes += iopl.fPageOffset;
- startPage = trunc_page_64(startPage);
-
- if (mapper)
- iopl.fMappedBase = mapBase + pageIndex;
- else
- iopl.fMappedBase = 0;
+ uplFlags |= UPL_SET_IO_WIRE | UPL_SET_LITE;
+ uplFlags |= UPL_MEMORY_TAG_MAKE(getVMTag(kernel_map));
- // Iterate over the current range, creating UPLs
- while (numBytes) {
- dataP = getDataP(_memoryEntries);
- vm_address_t kernelStart = (vm_address_t) startPage;
- vm_map_t theMap;
- if (curMap)
- theMap = curMap;
- else if (!sharedMem) {
- assert(_task == kernel_task);
- theMap = IOPageableMapForAddress(kernelStart);
- }
- else
- theMap = NULL;
-
- upl_page_info_array_t pageInfo = getPageList(dataP);
- int ioplFlags = uplFlags;
- upl_page_list_ptr_t baseInfo = &pageInfo[pageIndex];
-
- vm_size_t ioplSize = round_page_32(numBytes);
- unsigned int numPageInfo = atop_32(ioplSize);
-
- if (theMap == kernel_map && kernelStart < io_kernel_static_end) {
- error = io_get_kernel_static_upl(theMap,
- kernelStart,
- &ioplSize,
- &iopl.fIOPL,
- baseInfo,
- &numPageInfo,
- &highPage);
- }
- else if (sharedMem) {
- error = memory_object_iopl_request(sharedMem,
- ptoa_32(pageIndex),
- &ioplSize,
- &iopl.fIOPL,
- baseInfo,
- &numPageInfo,
- &ioplFlags);
- }
- else {
- assert(theMap);
- error = vm_map_create_upl(theMap,
- startPage,
- &ioplSize,
- &iopl.fIOPL,
- baseInfo,
- &numPageInfo,
- &ioplFlags);
- }
+ if (kIODirectionPrepareToPhys32 & forDirection)
+ {
+ if (!mapper) uplFlags |= UPL_NEED_32BIT_ADDR;
+ if (dataP->fDMAMapNumAddressBits > 32) dataP->fDMAMapNumAddressBits = 32;
+ }
+ if (kIODirectionPrepareNoFault & forDirection) uplFlags |= UPL_REQUEST_NO_FAULT;
+ if (kIODirectionPrepareNoZeroFill & forDirection) uplFlags |= UPL_NOZEROFILLIO;
+ if (kIODirectionPrepareNonCoherent & forDirection) uplFlags |= UPL_REQUEST_FORCE_COHERENCY;
+
+ mapBase = 0;
+
+ // Note that appendBytes(NULL) zeros the data up to the desired length
+ // and the length parameter is an unsigned int
+ size_t uplPageSize = dataP->fPageCnt * sizeof(upl_page_info_t);
+ if (uplPageSize > ((unsigned int)uplPageSize)) return (kIOReturnNoMemory);
+ if (!_memoryEntries->appendBytes(0, uplPageSize)) return (kIOReturnNoMemory);
+ dataP = 0;
+
+ // Find the appropriate vm_map for the given task
+ vm_map_t curMap;
+ if (_task == kernel_task && (kIOMemoryBufferPageable & _flags)) curMap = 0;
+ else curMap = get_task_map(_task);
+
+ // Iterate over the vector of virtual ranges
+ Ranges vec = _ranges;
+ unsigned int pageIndex = 0;
+ IOByteCount mdOffset = 0;
+ ppnum_t highestPage = 0;
+
+ IOMemoryEntry * memRefEntry = 0;
+ if (_memRef) memRefEntry = &_memRef->entries[0];
+
+ for (UInt range = 0; range < _rangesCount; range++) {
+ ioPLBlock iopl;
+ mach_vm_address_t startPage;
+ mach_vm_size_t numBytes;
+ ppnum_t highPage = 0;
+
+ // Get the startPage address and length of vec[range]
+ getAddrLenForInd(startPage, numBytes, type, vec, range);
+ iopl.fPageOffset = startPage & PAGE_MASK;
+ numBytes += iopl.fPageOffset;
+ startPage = trunc_page_64(startPage);
+
+ if (mapper)
+ iopl.fMappedPage = mapBase + pageIndex;
+ else
+ iopl.fMappedPage = 0;
+
+ // Iterate over the current range, creating UPLs
+ while (numBytes) {
+ vm_address_t kernelStart = (vm_address_t) startPage;
+ vm_map_t theMap;
+ if (curMap) theMap = curMap;
+ else if (_memRef)
+ {
+ theMap = NULL;
+ }
+ else
+ {
+ assert(_task == kernel_task);
+ theMap = IOPageableMapForAddress(kernelStart);
+ }
- assert(ioplSize);
- if (error != KERN_SUCCESS)
- goto abortExit;
-
- if (iopl.fIOPL)
- highPage = upl_get_highest_page(iopl.fIOPL);
- if (highPage > highestPage)
- highestPage = highPage;
-
- error = kIOReturnCannotWire;
-
- if (baseInfo->device) {
- numPageInfo = 1;
- iopl.fFlags = kIOPLOnDevice;
- // Don't translate device memory at all
- if (mapper && mapBase) {
- mapper->iovmFree(mapBase, _pages);
- mapBase = 0;
- iopl.fMappedBase = 0;
- }
- }
- else {
- iopl.fFlags = 0;
- if (mapper)
- mapper->iovmInsert(mapBase, pageIndex,
- baseInfo, numPageInfo);
- }
+ // ioplFlags is an in/out parameter
+ upl_control_flags_t ioplFlags = uplFlags;
+ dataP = getDataP(_memoryEntries);
+ pageInfo = getPageList(dataP);
+ upl_page_list_ptr_t baseInfo = &pageInfo[pageIndex];
+
+ mach_vm_size_t _ioplSize = round_page(numBytes);
+ upl_size_t ioplSize = (_ioplSize <= MAX_UPL_SIZE_BYTES) ? _ioplSize : MAX_UPL_SIZE_BYTES;
+ unsigned int numPageInfo = atop_32(ioplSize);
+
+ if ((theMap == kernel_map)
+ && (kernelStart >= io_kernel_static_start)
+ && (kernelStart < io_kernel_static_end)) {
+ error = io_get_kernel_static_upl(theMap,
+ kernelStart,
+ &ioplSize,
+ &iopl.fIOPL,
+ baseInfo,
+ &numPageInfo,
+ &highPage);
+ }
+ else if (_memRef) {
+ memory_object_offset_t entryOffset;
+
+ entryOffset = mdOffset;
+ entryOffset = (entryOffset - iopl.fPageOffset - memRefEntry->offset);
+ if (entryOffset >= memRefEntry->size) {
+ memRefEntry++;
+ if (memRefEntry >= &_memRef->entries[_memRef->count]) panic("memRefEntry");
+ entryOffset = 0;
+ }
+ if (ioplSize > (memRefEntry->size - entryOffset)) ioplSize = (memRefEntry->size - entryOffset);
+ error = memory_object_iopl_request(memRefEntry->entry,
+ entryOffset,
+ &ioplSize,
+ &iopl.fIOPL,
+ baseInfo,
+ &numPageInfo,
+ &ioplFlags);
+ }
+ else {
+ assert(theMap);
+ error = vm_map_create_upl(theMap,
+ startPage,
+ (upl_size_t*)&ioplSize,
+ &iopl.fIOPL,
+ baseInfo,
+ &numPageInfo,
+ &ioplFlags);
+ }
- iopl.fIOMDOffset = mdOffset;
- iopl.fPageInfo = pageIndex;
+ if (error != KERN_SUCCESS) goto abortExit;
- if ((_flags & kIOMemoryAutoPrepare) && iopl.fIOPL)
- {
- upl_commit(iopl.fIOPL, 0, 0);
- upl_deallocate(iopl.fIOPL);
- iopl.fIOPL = 0;
- }
+ assert(ioplSize);
+
+ if (iopl.fIOPL)
+ highPage = upl_get_highest_page(iopl.fIOPL);
+ if (highPage > highestPage)
+ highestPage = highPage;
- if (!_memoryEntries->appendBytes(&iopl, sizeof(iopl))) {
- // Clean up partial created and unsaved iopl
- if (iopl.fIOPL) {
- upl_abort(iopl.fIOPL, 0);
- upl_deallocate(iopl.fIOPL);
+ if (baseInfo->device) {
+ numPageInfo = 1;
+ iopl.fFlags = kIOPLOnDevice;
+ }
+ else {
+ iopl.fFlags = 0;
}
- goto abortExit;
- }
- // Check for a multiple iopl's in one virtual range
- pageIndex += numPageInfo;
- mdOffset -= iopl.fPageOffset;
- if (ioplSize < numBytes) {
- numBytes -= ioplSize;
- startPage += ioplSize;
- mdOffset += ioplSize;
- iopl.fPageOffset = 0;
- if (mapper)
- iopl.fMappedBase = mapBase + pageIndex;
- }
- else {
- mdOffset += numBytes;
- break;
+ iopl.fIOMDOffset = mdOffset;
+ iopl.fPageInfo = pageIndex;
+ if (mapper && pageIndex && (page_mask & (mdOffset + iopl.fPageOffset))) dataP->fDiscontig = true;
+
+ if (!_memoryEntries->appendBytes(&iopl, sizeof(iopl))) {
+ // Clean up partial created and unsaved iopl
+ if (iopl.fIOPL) {
+ upl_abort(iopl.fIOPL, 0);
+ upl_deallocate(iopl.fIOPL);
+ }
+ goto abortExit;
+ }
+ dataP = 0;
+
+ // Check for a multiple iopl's in one virtual range
+ pageIndex += numPageInfo;
+ mdOffset -= iopl.fPageOffset;
+ if (ioplSize < numBytes) {
+ numBytes -= ioplSize;
+ startPage += ioplSize;
+ mdOffset += ioplSize;
+ iopl.fPageOffset = 0;
+ if (mapper) iopl.fMappedPage = mapBase + pageIndex;
+ }
+ else {
+ mdOffset += numBytes;
+ break;
+ }
}
}
+
+ _highestPage = highestPage;
+
+ if (UPL_COPYOUT_FROM & uplFlags) _flags |= kIOMemoryPreparedReadOnly;
}
- _highestPage = highestPage;
+#if IOTRACKING
+ if (kIOReturnSuccess == error)
+ {
+ vm_tag_t tag;
+
+ dataP = getDataP(_memoryEntries);
+ if (forDirection & kIODirectionDMACommand) tag = (forDirection & kIODirectionDMACommandMask) >> kIODirectionDMACommandShift;
+ else tag = IOMemoryTag(kernel_map);
+
+ if (!_wireCount) vm_tag_set_init(&dataP->fWireTags, kMaxWireTags);
+ vm_tag_set_enter(&dataP->fWireTags, kMaxWireTags, tag);
- return kIOReturnSuccess;
+ IOMemoryDescriptorUpdateWireOwner(dataP, _memoryEntries, tag);
+ if (!_wireCount)
+ {
+ //if (!(_flags & kIOMemoryAutoPrepare))
+ IOTrackingAdd(gIOWireTracking, &dataP->fWireTracking, ptoa(_pages), false);
+ }
+ }
+#endif /* IOTRACKING */
+
+ return (error);
abortExit:
{
upl_deallocate(ioplList[range].fIOPL);
}
}
- (void) _memoryEntries->initWithBytes(dataP, sizeof(ioGMDData)); // == setLength()
-
- if (mapper && mapBase)
- mapper->iovmFree(mapBase, _pages);
+ (void) _memoryEntries->initWithBytes(dataP, computeDataSize(0, 0)); // == setLength()
}
if (error == KERN_FAILURE)
error = kIOReturnCannotWire;
+ else if (error == KERN_MEMORY_ERROR)
+ error = kIOReturnNoResources;
return error;
}
+bool IOGeneralMemoryDescriptor::initMemoryEntries(size_t size, IOMapper * mapper)
+{
+ ioGMDData * dataP;
+ unsigned dataSize = size;
+
+ if (!_memoryEntries) {
+ _memoryEntries = OSData::withCapacity(dataSize);
+ if (!_memoryEntries)
+ return false;
+ }
+ else if (!_memoryEntries->initWithCapacity(dataSize))
+ return false;
+
+ _memoryEntries->appendBytes(0, computeDataSize(0, 0));
+ dataP = getDataP(_memoryEntries);
+
+ if (mapper == kIOMapperWaitSystem) {
+ IOMapper::checkForSystemMapper();
+ mapper = IOMapper::gSystem;
+ }
+ dataP->fMapper = mapper;
+ dataP->fPageCnt = 0;
+ dataP->fMappedBase = 0;
+ dataP->fDMAMapNumAddressBits = 64;
+ dataP->fDMAMapAlignment = 0;
+ dataP->fPreparationID = kIOPreparationIDUnprepared;
+ dataP->fDiscontig = false;
+ dataP->fCompletionError = false;
+
+ return (true);
+}
+
+IOReturn IOMemoryDescriptor::dmaMap(
+ IOMapper * mapper,
+ IODMACommand * command,
+ const IODMAMapSpecification * mapSpec,
+ uint64_t offset,
+ uint64_t length,
+ uint64_t * mapAddress,
+ uint64_t * mapLength)
+{
+ IOReturn ret;
+ uint32_t mapOptions;
+
+ mapOptions = 0;
+ mapOptions |= kIODMAMapReadAccess;
+ if (!(kIOMemoryPreparedReadOnly & _flags)) mapOptions |= kIODMAMapWriteAccess;
+
+ ret = mapper->iovmMapMemory(this, offset, length, mapOptions,
+ mapSpec, command, NULL, mapAddress, mapLength);
+
+ return (ret);
+}
+
+IOReturn IOGeneralMemoryDescriptor::dmaMap(
+ IOMapper * mapper,
+ IODMACommand * command,
+ const IODMAMapSpecification * mapSpec,
+ uint64_t offset,
+ uint64_t length,
+ uint64_t * mapAddress,
+ uint64_t * mapLength)
+{
+ IOReturn err = kIOReturnSuccess;
+ ioGMDData * dataP;
+ IOOptionBits type = _flags & kIOMemoryTypeMask;
+
+ *mapAddress = 0;
+ if (kIOMemoryHostOnly & _flags) return (kIOReturnSuccess);
+
+ if ((type == kIOMemoryTypePhysical) || (type == kIOMemoryTypePhysical64)
+ || offset || (length != _length))
+ {
+ err = super::dmaMap(mapper, command, mapSpec, offset, length, mapAddress, mapLength);
+ }
+ else if (_memoryEntries && _pages && (dataP = getDataP(_memoryEntries)))
+ {
+ const ioPLBlock * ioplList = getIOPLList(dataP);
+ upl_page_info_t * pageList;
+ uint32_t mapOptions = 0;
+
+ IODMAMapSpecification mapSpec;
+ bzero(&mapSpec, sizeof(mapSpec));
+ mapSpec.numAddressBits = dataP->fDMAMapNumAddressBits;
+ mapSpec.alignment = dataP->fDMAMapAlignment;
+
+ // For external UPLs the fPageInfo field points directly to
+ // the upl's upl_page_info_t array.
+ if (ioplList->fFlags & kIOPLExternUPL)
+ {
+ pageList = (upl_page_info_t *) ioplList->fPageInfo;
+ mapOptions |= kIODMAMapPagingPath;
+ }
+ else pageList = getPageList(dataP);
+
+ if ((_length == ptoa_64(_pages)) && !(page_mask & ioplList->fPageOffset))
+ {
+ mapOptions |= kIODMAMapPageListFullyOccupied;
+ }
+
+ mapOptions |= kIODMAMapReadAccess;
+ if (!(kIOMemoryPreparedReadOnly & _flags)) mapOptions |= kIODMAMapWriteAccess;
+
+ // Check for direct device non-paged memory
+ if (ioplList->fFlags & kIOPLOnDevice) mapOptions |= kIODMAMapPhysicallyContiguous;
+
+ IODMAMapPageList dmaPageList =
+ {
+ .pageOffset = (uint32_t)(ioplList->fPageOffset & page_mask),
+ .pageListCount = _pages,
+ .pageList = &pageList[0]
+ };
+ err = mapper->iovmMapMemory(this, offset, length, mapOptions, &mapSpec,
+ command, &dmaPageList, mapAddress, mapLength);
+ }
+
+ return (err);
+}
+
/*
* prepare
*
* the memory after the I/O transfer finishes. This method needn't
* called for non-pageable memory.
*/
+
IOReturn IOGeneralMemoryDescriptor::prepare(IODirection forDirection)
{
- IOReturn error = kIOReturnSuccess;
+ IOReturn error = kIOReturnSuccess;
IOOptionBits type = _flags & kIOMemoryTypeMask;
if ((kIOMemoryTypePhysical == type) || (kIOMemoryTypePhysical64 == type))
return kIOReturnSuccess;
- if (_prepareLock)
- IOLockLock(_prepareLock);
+ if (_prepareLock) IOLockLock(_prepareLock);
- if (!_wireCount
- && (kIOMemoryTypeVirtual == type || kIOMemoryTypeVirtual64 == type || kIOMemoryTypeUIO == type) ) {
+ if (kIODirectionDMACommand & forDirection)
+ {
+#if IOMD_DEBUG_DMAACTIVE
+ OSIncrementAtomic(&__iomd_reservedA);
+#endif /* IOMD_DEBUG_DMAACTIVE */
+ }
+ if (kIOMemoryTypeVirtual == type || kIOMemoryTypeVirtual64 == type || kIOMemoryTypeUIO == type)
+ {
error = wireVirtual(forDirection);
}
- if (kIOReturnSuccess == error)
- _wireCount++;
+ if ((kIOReturnSuccess == error) && !(kIODirectionDMACommand & forDirection))
+ {
+ if (1 == ++_wireCount)
+ {
+ if (kIOMemoryClearEncrypt & _flags)
+ {
+ performOperation(kIOMemoryClearEncrypted, 0, _length);
+ }
+ }
+ }
- if (_prepareLock)
- IOLockUnlock(_prepareLock);
+ if (_prepareLock) IOLockUnlock(_prepareLock);
return error;
}
* issued; the prepare() and complete() must occur in pairs, before
* before and after an I/O transfer involving pageable memory.
*/
-
-IOReturn IOGeneralMemoryDescriptor::complete(IODirection /* forDirection */)
+
+IOReturn IOGeneralMemoryDescriptor::complete(IODirection forDirection)
{
IOOptionBits type = _flags & kIOMemoryTypeMask;
+ ioGMDData * dataP;
if ((kIOMemoryTypePhysical == type) || (kIOMemoryTypePhysical64 == type))
return kIOReturnSuccess;
- if (_prepareLock)
- IOLockLock(_prepareLock);
+ if (_prepareLock) IOLockLock(_prepareLock);
+ do
+ {
+ assert(_wireCount);
+ if (!_wireCount) break;
+ dataP = getDataP(_memoryEntries);
+ if (!dataP) break;
+
+#if IOMD_DEBUG_DMAACTIVE
+ if (kIODirectionDMACommand & forDirection)
+ {
+ if (__iomd_reservedA) OSDecrementAtomic(&__iomd_reservedA);
+ else panic("kIOMDSetDMAInactive");
+ }
+#endif /* IOMD_DEBUG_DMAACTIVE */
+#if IOTRACKING
+ if (kIOMemoryTypeVirtual == type || kIOMemoryTypeVirtual64 == type || kIOMemoryTypeUIO == type)
+ {
+ vm_tag_t tag;
+
+ if (forDirection & kIODirectionDMACommand) tag = (forDirection & kIODirectionDMACommandMask) >> kIODirectionDMACommandShift;
+ else tag = IOMemoryTag(kernel_map);
+ vm_tag_set_remove(&dataP->fWireTags, kMaxWireTags, tag, &tag);
+ IOMemoryDescriptorUpdateWireOwner(dataP, _memoryEntries, tag);
+ }
+ if (kIODirectionDMACommand & forDirection) break;
+#endif /* IOTRACKING */
+
+ if (kIODirectionCompleteWithError & forDirection) dataP->fCompletionError = true;
+
+ if ((kIOMemoryClearEncrypt & _flags) && (1 == _wireCount))
+ {
+ performOperation(kIOMemorySetEncrypted, 0, _length);
+ }
+
+ _wireCount--;
+ if (!_wireCount || (kIODirectionCompleteWithDataValid & forDirection))
+ {
+ ioPLBlock *ioplList = getIOPLList(dataP);
+ UInt ind, count = getNumIOPL(_memoryEntries, dataP);
+
+ if (_wireCount)
+ {
+ // kIODirectionCompleteWithDataValid & forDirection
+ if (kIOMemoryTypeVirtual == type || kIOMemoryTypeVirtual64 == type || kIOMemoryTypeUIO == type)
+ {
+ for (ind = 0; ind < count; ind++)
+ {
+ if (ioplList[ind].fIOPL) iopl_valid_data(ioplList[ind].fIOPL);
+ }
+ }
+ }
+ else
+ {
+#if IOMD_DEBUG_DMAACTIVE
+ if (__iomd_reservedA) panic("complete() while dma active");
+#endif /* IOMD_DEBUG_DMAACTIVE */
+
+ if (dataP->fMappedBase) {
+ dataP->fMapper->iovmUnmapMemory(this, NULL, dataP->fMappedBase, dataP->fMappedLength);
+ dataP->fMappedBase = 0;
+ }
+ // Only complete iopls that we created which are for TypeVirtual
+ if (kIOMemoryTypeVirtual == type || kIOMemoryTypeVirtual64 == type || kIOMemoryTypeUIO == type) {
+#if IOTRACKING
+ //if (!(_flags & kIOMemoryAutoPrepare))
+ {
+ IOTrackingRemove(gIOWireTracking, &dataP->fWireTracking, ptoa(_pages));
+ }
+#endif /* IOTRACKING */
+ for (ind = 0; ind < count; ind++)
+ if (ioplList[ind].fIOPL) {
+ if (dataP->fCompletionError)
+ upl_abort(ioplList[ind].fIOPL, 0 /*!UPL_ABORT_DUMP_PAGES*/);
+ else
+ upl_commit(ioplList[ind].fIOPL, 0, 0);
+ upl_deallocate(ioplList[ind].fIOPL);
+ }
+ } else if (kIOMemoryTypeUPL == type) {
+ upl_set_referenced(ioplList[0].fIOPL, false);
+ }
- assert(_wireCount);
+ (void) _memoryEntries->initWithBytes(dataP, computeDataSize(0, 0)); // == setLength()
- if (_wireCount)
- {
- _wireCount--;
- if (!_wireCount)
- {
- IOOptionBits type = _flags & kIOMemoryTypeMask;
- ioGMDData * dataP = getDataP(_memoryEntries);
- ioPLBlock *ioplList = getIOPLList(dataP);
- UInt count = getNumIOPL(_memoryEntries, dataP);
-
- if (dataP->fMapper && _pages && ioplList[0].fMappedBase)
- dataP->fMapper->iovmFree(ioplList[0].fMappedBase, _pages);
-
- // Only complete iopls that we created which are for TypeVirtual
- if (kIOMemoryTypeVirtual == type || kIOMemoryTypeVirtual64 == type || kIOMemoryTypeUIO == type) {
- for (UInt ind = 0; ind < count; ind++)
- if (ioplList[ind].fIOPL) {
- upl_commit(ioplList[ind].fIOPL, 0, 0);
- upl_deallocate(ioplList[ind].fIOPL);
- }
- }
- (void) _memoryEntries->initWithBytes(dataP, sizeof(ioGMDData)); // == setLength()
- }
+ dataP->fPreparationID = kIOPreparationIDUnprepared;
+ dataP->fAllocTag = VM_KERN_MEMORY_NONE;
+ }
+ }
}
+ while (false);
- if (_prepareLock)
- IOLockUnlock(_prepareLock);
+ if (_prepareLock) IOLockUnlock(_prepareLock);
return kIOReturnSuccess;
}
IOOptionBits options,
IOByteCount __offset,
IOByteCount __length )
-
{
+#ifndef __LP64__
if (!(kIOMap64Bit & options)) panic("IOGeneralMemoryDescriptor::doMap !64bit");
+#endif /* !__LP64__ */
+
+ kern_return_t err;
- _IOMemoryMap * mapping = (_IOMemoryMap *) *__address;
+ IOMemoryMap * mapping = (IOMemoryMap *) *__address;
mach_vm_size_t offset = mapping->fOffset + __offset;
mach_vm_size_t length = mapping->fLength;
- kern_return_t kr;
- ipc_port_t sharedMem = (ipc_port_t) _memEntry;
-
IOOptionBits type = _flags & kIOMemoryTypeMask;
Ranges vec = _ranges;
- user_addr_t range0Addr = 0;
- IOByteCount range0Len = 0;
+ mach_vm_address_t range0Addr = 0;
+ mach_vm_size_t range0Len = 0;
+
+ if ((offset >= _length) || ((offset + length) > _length))
+ return( kIOReturnBadArgument );
if (vec.v)
getAddrLenForInd(range0Addr, range0Len, type, vec, 0);
// mapping source == dest? (could be much better)
- if( _task
- && (mapping->fAddressMap == get_task_map(_task)) && (options & kIOMapAnywhere)
- && (1 == _rangesCount) && (0 == offset)
- && range0Addr && (length <= range0Len) )
+ if (_task
+ && (mapping->fAddressTask == _task)
+ && (mapping->fAddressMap == get_task_map(_task))
+ && (options & kIOMapAnywhere)
+ && (1 == _rangesCount)
+ && (0 == offset)
+ && range0Addr
+ && (length <= range0Len))
{
mapping->fAddress = range0Addr;
mapping->fOptions |= kIOMapStatic;
return( kIOReturnSuccess );
}
- if( 0 == sharedMem) {
-
- vm_size_t size = ptoa_32(_pages);
-
- if( _task) {
-
- memory_object_size_t actualSize = size;
- vm_prot_t prot = VM_PROT_READ;
- if (!(kIOMapReadOnly & options))
- prot |= VM_PROT_WRITE;
- else if (kIOMapDefaultCache != (options & kIOMapCacheMask))
- prot |= VM_PROT_WRITE;
-
- kr = mach_make_memory_entry_64(get_task_map(_task),
- &actualSize, range0Addr,
- prot, &sharedMem,
- NULL );
-
- if( (KERN_SUCCESS == kr) && (actualSize != round_page_32(size))) {
-#if IOASSERT
- IOLog("mach_make_memory_entry_64 (%08llx) size (%08lx:%08x)\n",
- range0Addr, (UInt32) actualSize, size);
+ if (!_memRef)
+ {
+ IOOptionBits createOptions = 0;
+ if (!(kIOMapReadOnly & options))
+ {
+ createOptions |= kIOMemoryReferenceWrite;
+#if DEVELOPMENT || DEBUG
+ if (kIODirectionOut == (kIODirectionOutIn & _flags))
+ {
+ OSReportWithBacktrace("warning: creating writable mapping from IOMemoryDescriptor(kIODirectionOut) - use kIOMapReadOnly or change direction");
+ }
#endif
- kr = kIOReturnVMError;
- ipc_port_release_send( sharedMem );
- }
-
- if( KERN_SUCCESS != kr)
- sharedMem = MACH_PORT_NULL;
-
- } else do { // _task == 0, must be physical
+ }
+ err = memoryReferenceCreate(createOptions, &_memRef);
+ if (kIOReturnSuccess != err) return (err);
+ }
- memory_object_t pager;
- unsigned int flags = 0;
- addr64_t pa;
- IOPhysicalLength segLen;
+ memory_object_t pager;
+ pager = (memory_object_t) (reserved ? reserved->dp.devicePager : 0);
- pa = getPhysicalSegment64( offset, &segLen );
+ // <upl_transpose //
+ if ((kIOMapReference|kIOMapUnique) == ((kIOMapReference|kIOMapUnique) & options))
+ {
+ do
+ {
+ upl_t redirUPL2;
+ upl_size_t size;
+ upl_control_flags_t flags;
+ unsigned int lock_count;
- if( !reserved) {
- reserved = IONew( ExpansionData, 1 );
- if( !reserved)
- continue;
- }
- reserved->pagerContig = (1 == _rangesCount);
- reserved->memory = this;
+ if (!_memRef || (1 != _memRef->count))
+ {
+ err = kIOReturnNotReadable;
+ break;
+ }
- /*What cache mode do we need*/
- switch(options & kIOMapCacheMask ) {
+ size = round_page(mapping->fLength);
+ flags = UPL_COPYOUT_FROM | UPL_SET_INTERNAL
+ | UPL_SET_LITE | UPL_SET_IO_WIRE | UPL_BLOCK_ACCESS
+ | UPL_MEMORY_TAG_MAKE(getVMTag(kernel_map));
- case kIOMapDefaultCache:
- default:
- flags = IODefaultCacheBits(pa);
- if (DEVICE_PAGER_CACHE_INHIB & flags)
- {
- if (DEVICE_PAGER_GUARDED & flags)
- mapping->fOptions |= kIOMapInhibitCache;
- else
- mapping->fOptions |= kIOMapWriteCombineCache;
- }
- else if (DEVICE_PAGER_WRITE_THROUGH & flags)
- mapping->fOptions |= kIOMapWriteThruCache;
- else
- mapping->fOptions |= kIOMapCopybackCache;
- break;
-
- case kIOMapInhibitCache:
- flags = DEVICE_PAGER_CACHE_INHIB |
- DEVICE_PAGER_COHERENT | DEVICE_PAGER_GUARDED;
- break;
-
- case kIOMapWriteThruCache:
- flags = DEVICE_PAGER_WRITE_THROUGH |
- DEVICE_PAGER_COHERENT | DEVICE_PAGER_GUARDED;
- break;
+ if (KERN_SUCCESS != memory_object_iopl_request(_memRef->entries[0].entry, 0, &size, &redirUPL2,
+ NULL, NULL,
+ &flags))
+ redirUPL2 = NULL;
- case kIOMapCopybackCache:
- flags = DEVICE_PAGER_COHERENT;
- break;
+ for (lock_count = 0;
+ IORecursiveLockHaveLock(gIOMemoryLock);
+ lock_count++) {
+ UNLOCK;
+ }
+ err = upl_transpose(redirUPL2, mapping->fRedirUPL);
+ for (;
+ lock_count;
+ lock_count--) {
+ LOCK;
+ }
- case kIOMapWriteCombineCache:
- flags = DEVICE_PAGER_CACHE_INHIB |
- DEVICE_PAGER_COHERENT;
- break;
- }
+ if (kIOReturnSuccess != err)
+ {
+ IOLog("upl_transpose(%x)\n", err);
+ err = kIOReturnSuccess;
+ }
- flags |= reserved->pagerContig ? DEVICE_PAGER_CONTIGUOUS : 0;
+ if (redirUPL2)
+ {
+ upl_commit(redirUPL2, NULL, 0);
+ upl_deallocate(redirUPL2);
+ redirUPL2 = 0;
+ }
+ {
+ // swap the memEntries since they now refer to different vm_objects
+ IOMemoryReference * me = _memRef;
+ _memRef = mapping->fMemory->_memRef;
+ mapping->fMemory->_memRef = me;
+ }
+ if (pager)
+ err = populateDevicePager( pager, mapping->fAddressMap, mapping->fAddress, offset, length, options );
+ }
+ while (false);
+ }
+ // upl_transpose> //
+ else
+ {
+ err = memoryReferenceMap(_memRef, mapping->fAddressMap, offset, length, options, &mapping->fAddress);
+#if IOTRACKING
+ if ((err == KERN_SUCCESS) && ((kIOTracking & gIOKitDebug) || _task))
+ {
+ // only dram maps in the default on developement case
+ IOTrackingAddUser(gIOMapTracking, &mapping->fTracking, mapping->fLength);
+ }
+#endif /* IOTRACKING */
+ if ((err == KERN_SUCCESS) && pager)
+ {
+ err = populateDevicePager(pager, mapping->fAddressMap, mapping->fAddress, offset, length, options);
- pager = device_pager_setup( (memory_object_t) 0, (int) reserved,
- size, flags);
- assert( pager );
+ if (err != KERN_SUCCESS) doUnmap(mapping->fAddressMap, (IOVirtualAddress) mapping, 0);
+ else if (kIOMapDefaultCache == (options & kIOMapCacheMask))
+ {
+ mapping->fOptions |= ((_flags & kIOMemoryBufferCacheMask) >> kIOMemoryBufferCacheShift);
+ }
+ }
+ }
- if( pager) {
- kr = mach_memory_object_memory_entry_64( (host_t) 1, false /*internal*/,
- size, VM_PROT_READ | VM_PROT_WRITE, pager, &sharedMem );
+ return (err);
+}
- assert( KERN_SUCCESS == kr );
- if( KERN_SUCCESS != kr)
- {
- device_pager_deallocate( pager );
- pager = MACH_PORT_NULL;
- sharedMem = MACH_PORT_NULL;
- }
- }
- if( pager && sharedMem)
- reserved->devicePager = pager;
- else {
- IODelete( reserved, ExpansionData, 1 );
- reserved = 0;
- }
+#if IOTRACKING
+IOReturn
+IOMemoryMapTracking(IOTrackingUser * tracking, task_t * task,
+ mach_vm_address_t * address, mach_vm_size_t * size)
+{
+#define iomap_offsetof(type, field) ((size_t)(&((type *)0)->field))
- } while( false );
+ IOMemoryMap * map = (typeof(map)) (((uintptr_t) tracking) - iomap_offsetof(IOMemoryMap, fTracking));
- _memEntry = (void *) sharedMem;
- }
+ if (!map->fAddressMap || (map->fAddressMap != get_task_map(map->fAddressTask))) return (kIOReturnNotReady);
- IOReturn result;
- if (0 == sharedMem)
- result = kIOReturnVMError;
- else
- result = super::doMap( __addressMap, __address,
- options, __offset, __length );
+ *task = map->fAddressTask;
+ *address = map->fAddress;
+ *size = map->fLength;
- return( result );
+ return (kIOReturnSuccess);
}
+#endif /* IOTRACKING */
IOReturn IOGeneralMemoryDescriptor::doUnmap(
vm_map_t addressMap,
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-OSDefineMetaClassAndAbstractStructors( IOMemoryMap, OSObject )
-
-/* inline function implementation */
-IOPhysicalAddress IOMemoryMap::getPhysicalAddress()
- { return( getPhysicalSegment( 0, 0 )); }
+#undef super
+#define super OSObject
+OSDefineMetaClassAndStructors( IOMemoryMap, OSObject )
-#undef super
-#define super IOMemoryMap
+OSMetaClassDefineReservedUnused(IOMemoryMap, 0);
+OSMetaClassDefineReservedUnused(IOMemoryMap, 1);
+OSMetaClassDefineReservedUnused(IOMemoryMap, 2);
+OSMetaClassDefineReservedUnused(IOMemoryMap, 3);
+OSMetaClassDefineReservedUnused(IOMemoryMap, 4);
+OSMetaClassDefineReservedUnused(IOMemoryMap, 5);
+OSMetaClassDefineReservedUnused(IOMemoryMap, 6);
+OSMetaClassDefineReservedUnused(IOMemoryMap, 7);
-OSDefineMetaClassAndStructors(_IOMemoryMap, IOMemoryMap)
+/* ex-inline function implementation */
+IOPhysicalAddress IOMemoryMap::getPhysicalAddress()
+ { return( getPhysicalSegment( 0, 0 )); }
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-bool _IOMemoryMap::init(
+bool IOMemoryMap::init(
task_t intoTask,
mach_vm_address_t toAddress,
IOOptionBits _options,
return (true);
}
-bool _IOMemoryMap::setMemoryDescriptor(IOMemoryDescriptor * _memory, mach_vm_size_t _offset)
+bool IOMemoryMap::setMemoryDescriptor(IOMemoryDescriptor * _memory, mach_vm_size_t _offset)
{
if (!_memory)
return(false);
return( true );
}
-struct IOMemoryDescriptorMapAllocRef
-{
- ipc_port_t sharedMem;
- mach_vm_address_t mapped;
- mach_vm_size_t size;
- mach_vm_size_t sourceOffset;
- IOOptionBits options;
-};
-
-static kern_return_t IOMemoryDescriptorMapAlloc(vm_map_t map, void * _ref)
-{
- IOMemoryDescriptorMapAllocRef * ref = (IOMemoryDescriptorMapAllocRef *)_ref;
- IOReturn err;
-
- do {
- if( ref->sharedMem)
- {
- vm_prot_t prot = VM_PROT_READ
- | ((ref->options & kIOMapReadOnly) ? 0 : VM_PROT_WRITE);
-
- // VM system requires write access to change cache mode
- if (kIOMapDefaultCache != (ref->options & kIOMapCacheMask))
- prot |= VM_PROT_WRITE;
-
- // set memory entry cache
- vm_prot_t memEntryCacheMode = prot | MAP_MEM_ONLY;
- switch (ref->options & kIOMapCacheMask)
- {
- case kIOMapInhibitCache:
- SET_MAP_MEM(MAP_MEM_IO, memEntryCacheMode);
- break;
-
- case kIOMapWriteThruCache:
- SET_MAP_MEM(MAP_MEM_WTHRU, memEntryCacheMode);
- break;
-
- case kIOMapWriteCombineCache:
- SET_MAP_MEM(MAP_MEM_WCOMB, memEntryCacheMode);
- break;
-
- case kIOMapCopybackCache:
- SET_MAP_MEM(MAP_MEM_COPYBACK, memEntryCacheMode);
- break;
-
- case kIOMapDefaultCache:
- default:
- SET_MAP_MEM(MAP_MEM_NOOP, memEntryCacheMode);
- break;
- }
-
- vm_size_t unused = 0;
-
- err = mach_make_memory_entry( NULL /*unused*/, &unused, 0 /*unused*/,
- memEntryCacheMode, NULL, ref->sharedMem );
- if (KERN_SUCCESS != err)
- IOLog("MAP_MEM_ONLY failed %d\n", err);
-
- err = mach_vm_map( map,
- &ref->mapped,
- ref->size, 0 /* mask */,
- (( ref->options & kIOMapAnywhere ) ? VM_FLAGS_ANYWHERE : VM_FLAGS_FIXED)
- | VM_MAKE_TAG(VM_MEMORY_IOKIT),
- ref->sharedMem, ref->sourceOffset,
- false, // copy
- prot, // cur
- prot, // max
- VM_INHERIT_NONE);
-
- if( KERN_SUCCESS != err) {
- ref->mapped = 0;
- continue;
- }
-
- }
- else
- {
- err = mach_vm_allocate( map, &ref->mapped, ref->size,
- ((ref->options & kIOMapAnywhere) ? VM_FLAGS_ANYWHERE : VM_FLAGS_FIXED)
- | VM_MAKE_TAG(VM_MEMORY_IOKIT) );
- if( KERN_SUCCESS != err) {
- ref->mapped = 0;
- continue;
- }
- // we have to make sure that these guys don't get copied if we fork.
- err = vm_inherit( map, ref->mapped, ref->size, VM_INHERIT_NONE);
- assert( KERN_SUCCESS == err );
- }
- }
- while( false );
-
- return( err );
-}
-
-kern_return_t
-IOMemoryDescriptorMapMemEntry(vm_map_t map, ipc_port_t entry, IOOptionBits options, bool pageable,
- mach_vm_size_t offset,
- mach_vm_address_t * address, mach_vm_size_t length)
-{
- IOReturn err;
- IOMemoryDescriptorMapAllocRef ref;
-
- ref.sharedMem = entry;
- ref.sourceOffset = trunc_page_64(offset);
- ref.options = options;
-
- ref.size = length;
-
- if (options & kIOMapAnywhere)
- // vm_map looks for addresses above here, even when VM_FLAGS_ANYWHERE
- ref.mapped = 0;
- else
- ref.mapped = *address;
-
- if( ref.sharedMem && (map == kernel_map) && pageable)
- err = IOIteratePageableMaps( ref.size, &IOMemoryDescriptorMapAlloc, &ref );
- else
- err = IOMemoryDescriptorMapAlloc( map, &ref );
-
- *address = ref.mapped;
- return (err);
-}
-
-
IOReturn IOMemoryDescriptor::doMap(
vm_map_t __addressMap,
IOVirtualAddress * __address,
IOByteCount __offset,
IOByteCount __length )
{
- if (!(kIOMap64Bit & options)) panic("IOMemoryDescriptor::doMap !64bit");
-
- _IOMemoryMap * mapping = (_IOMemoryMap *) *__address;
- mach_vm_size_t offset = mapping->fOffset + __offset;
- mach_vm_size_t length = mapping->fLength;
-
- IOReturn err = kIOReturnSuccess;
- memory_object_t pager;
- mach_vm_size_t pageOffset;
- IOPhysicalAddress sourceAddr;
+ return (kIOReturnUnsupported);
+}
- do
+IOReturn IOMemoryDescriptor::handleFault(
+ void * _pager,
+ mach_vm_size_t sourceOffset,
+ mach_vm_size_t length)
+{
+ if( kIOMemoryRedirected & _flags)
{
- sourceAddr = getSourceSegment( offset, NULL );
- pageOffset = sourceAddr - trunc_page_32( sourceAddr );
-
- if( reserved)
- pager = (memory_object_t) reserved->devicePager;
- else
- pager = MACH_PORT_NULL;
-
- if ((kIOMapReference|kIOMapUnique) == ((kIOMapReference|kIOMapUnique) & options))
- {
- upl_t redirUPL2;
- vm_size_t size;
- int flags;
-
- if (!_memEntry)
- {
- err = kIOReturnNotReadable;
- continue;
- }
-
- size = mapping->fLength + pageOffset;
- flags = UPL_COPYOUT_FROM | UPL_SET_INTERNAL
- | UPL_SET_LITE | UPL_SET_IO_WIRE | UPL_BLOCK_ACCESS;
-
- if (KERN_SUCCESS != memory_object_iopl_request((ipc_port_t) _memEntry, 0, &size, &redirUPL2,
- NULL, NULL,
- &flags))
- redirUPL2 = NULL;
-
- err = upl_transpose(redirUPL2, mapping->fRedirUPL);
- if (kIOReturnSuccess != err)
- {
- IOLog("upl_transpose(%x)\n", err);
- err = kIOReturnSuccess;
- }
-
- if (redirUPL2)
- {
- upl_commit(redirUPL2, NULL, 0);
- upl_deallocate(redirUPL2);
- redirUPL2 = 0;
- }
- {
- // swap the memEntries since they now refer to different vm_objects
- void * me = _memEntry;
- _memEntry = mapping->fMemory->_memEntry;
- mapping->fMemory->_memEntry = me;
- }
- if (pager)
- err = handleFault( reserved->devicePager, mapping->fAddressMap, mapping->fAddress, offset, length, options );
- }
- else
- {
- mach_vm_address_t address;
-
- if (!(options & kIOMapAnywhere))
- {
- address = trunc_page_64(mapping->fAddress);
- if( (mapping->fAddress - address) != pageOffset)
- {
- err = kIOReturnVMError;
- continue;
- }
- }
-
- err = IOMemoryDescriptorMapMemEntry(mapping->fAddressMap, (ipc_port_t) _memEntry,
- options, (kIOMemoryBufferPageable & _flags),
- offset, &address, round_page_64(length + pageOffset));
- if( err != KERN_SUCCESS)
- continue;
-
- if (!_memEntry || pager)
- {
- err = handleFault( pager, mapping->fAddressMap, address, offset, length, options );
- if (err != KERN_SUCCESS)
- doUnmap( mapping->fAddressMap, (IOVirtualAddress) mapping, 0 );
- }
-
-#ifdef DEBUG
- if (kIOLogMapping & gIOKitDebug)
- IOLog("mapping(%x) desc %p @ %lx, map %p, address %qx, offset %qx, length %qx\n",
- err, this, sourceAddr, mapping, address, offset, length);
+#if DEBUG
+ IOLog("sleep mem redirect %p, %qx\n", this, sourceOffset);
#endif
-
- if (err == KERN_SUCCESS)
- mapping->fAddress = address + pageOffset;
- else
- mapping->fAddress = NULL;
- }
+ do {
+ SLEEP;
+ } while( kIOMemoryRedirected & _flags );
}
- while( false );
-
- return (err);
+ return (kIOReturnSuccess);
}
-enum {
- kIOMemoryRedirected = 0x00010000
-};
-
-IOReturn IOMemoryDescriptor::handleFault(
+IOReturn IOMemoryDescriptor::populateDevicePager(
void * _pager,
vm_map_t addressMap,
mach_vm_address_t address,
mach_vm_size_t page;
mach_vm_size_t pageOffset;
mach_vm_size_t pagerOffset;
- IOPhysicalLength segLen;
+ IOPhysicalLength segLen, chunk;
addr64_t physAddr;
+ IOOptionBits type;
- if( !addressMap)
- {
- if( kIOMemoryRedirected & _flags)
- {
-#ifdef DEBUG
- IOLog("sleep mem redirect %p, %qx\n", this, sourceOffset);
-#endif
- do {
- SLEEP;
- } while( kIOMemoryRedirected & _flags );
- }
+ type = _flags & kIOMemoryTypeMask;
- return( kIOReturnSuccess );
+ if (reserved->dp.pagerContig)
+ {
+ sourceOffset = 0;
+ pagerOffset = 0;
}
- physAddr = getPhysicalSegment64( sourceOffset, &segLen );
+ physAddr = getPhysicalSegment( sourceOffset, &segLen, kIOMemoryMapperNone );
assert( physAddr );
pageOffset = physAddr - trunc_page_64( physAddr );
pagerOffset = sourceOffset;
do
{
// in the middle of the loop only map whole pages
- if( segLen >= bytes)
- segLen = bytes;
- else if( segLen != trunc_page_32( segLen))
- err = kIOReturnVMError;
- if( physAddr != trunc_page_64( physAddr))
- err = kIOReturnBadArgument;
- if (kIOReturnSuccess != err)
- break;
-
-#ifdef DEBUG
- if( kIOLogMapping & gIOKitDebug)
- IOLog("_IOMemoryMap::map(%p) 0x%qx->0x%qx:0x%qx\n",
- addressMap, address + pageOffset, physAddr + pageOffset,
- segLen - pageOffset);
-#endif
+ if( segLen >= bytes) segLen = bytes;
+ else if (segLen != trunc_page(segLen)) err = kIOReturnVMError;
+ if (physAddr != trunc_page_64(physAddr)) err = kIOReturnBadArgument;
+ if (kIOReturnSuccess != err) break;
- if( pager) {
- if( reserved && reserved->pagerContig) {
- IOPhysicalLength allLen;
- addr64_t allPhys;
-
- allPhys = getPhysicalSegment64( 0, &allLen );
- assert( allPhys );
- err = device_pager_populate_object( pager, 0, atop_64(allPhys), round_page_32(allLen) );
- }
- else
- {
+#if DEBUG || DEVELOPMENT
+ if ((kIOMemoryTypeUPL != type)
+ && pmap_has_managed_page(atop_64(physAddr), atop_64(physAddr + segLen - 1)))
+ {
+ OSReportWithBacktrace("IOMemoryDescriptor physical with managed page 0x%qx:0x%qx", physAddr, segLen);
+ }
+#endif /* DEBUG || DEVELOPMENT */
- for( page = 0;
- (page < segLen) && (KERN_SUCCESS == err);
- page += page_size)
- {
- err = device_pager_populate_object(pager, pagerOffset,
- (ppnum_t)(atop_64(physAddr + page)), page_size);
- pagerOffset += page_size;
- }
- }
- assert( KERN_SUCCESS == err );
- if( err)
- break;
+ chunk = (reserved->dp.pagerContig ? round_page(segLen) : page_size);
+ for (page = 0;
+ (page < segLen) && (KERN_SUCCESS == err);
+ page += chunk)
+ {
+ err = device_pager_populate_object(pager, pagerOffset,
+ (ppnum_t)(atop_64(physAddr + page)), chunk);
+ pagerOffset += chunk;
}
+ assert (KERN_SUCCESS == err);
+ if (err) break;
+
// This call to vm_fault causes an early pmap level resolution
// of the mappings created above for kernel mappings, since
// faulting in later can't take place from interrupt level.
- /* *** ALERT *** */
- /* *** Temporary Workaround *** */
-
if ((addressMap == kernel_map) && !(kIOMemoryRedirected & _flags))
{
- vm_fault(addressMap,
- (vm_map_offset_t)address,
- VM_PROT_READ|VM_PROT_WRITE,
- FALSE, THREAD_UNINT, NULL,
- (vm_map_offset_t)0);
+ vm_fault(addressMap,
+ (vm_map_offset_t)trunc_page_64(address),
+ VM_PROT_READ|VM_PROT_WRITE,
+ FALSE, THREAD_UNINT, NULL,
+ (vm_map_offset_t)0);
}
- /* *** Temporary Workaround *** */
- /* *** ALERT *** */
-
sourceOffset += segLen - pageOffset;
address += segLen;
bytes -= segLen;
pageOffset = 0;
-
}
- while (bytes && (physAddr = getPhysicalSegment64( sourceOffset, &segLen )));
+ while (bytes && (physAddr = getPhysicalSegment( sourceOffset, &segLen, kIOMemoryMapperNone )));
if (bytes)
err = kIOReturnBadArgument;
IOByteCount __length )
{
IOReturn err;
+ IOMemoryMap * mapping;
mach_vm_address_t address;
- mach_vm_size_t length;
-
- if (__length)
- {
- address = __address;
- length = __length;
- }
- else
- {
- addressMap = ((_IOMemoryMap *) __address)->fAddressMap;
- address = ((_IOMemoryMap *) __address)->fAddress;
- length = ((_IOMemoryMap *) __address)->fLength;
- }
+ mach_vm_size_t length;
+
+ if (__length) panic("doUnmap");
- if( _memEntry && (addressMap == kernel_map) && (kIOMemoryBufferPageable & _flags))
- addressMap = IOPageableMapForAddress( address );
+ mapping = (IOMemoryMap *) __address;
+ addressMap = mapping->fAddressMap;
+ address = mapping->fAddress;
+ length = mapping->fLength;
-#ifdef DEBUG
- if( kIOLogMapping & gIOKitDebug)
- IOLog("IOMemoryDescriptor::doUnmap map %p, 0x%qx:0x%qx\n",
- addressMap, address, length );
+ if (kIOMapOverwrite & mapping->fOptions) err = KERN_SUCCESS;
+ else
+ {
+ if ((addressMap == kernel_map) && (kIOMemoryBufferPageable & _flags))
+ addressMap = IOPageableMapForAddress( address );
+#if DEBUG
+ if( kIOLogMapping & gIOKitDebug) IOLog("IOMemoryDescriptor::doUnmap map %p, 0x%qx:0x%qx\n",
+ addressMap, address, length );
#endif
+ err = mach_vm_deallocate( addressMap, address, length );
+ }
- err = mach_vm_deallocate( addressMap, address, length );
+#if IOTRACKING
+ IOTrackingRemoveUser(gIOMapTracking, &mapping->fTracking);
+#endif /* IOTRACKING */
return (err);
}
IOReturn IOMemoryDescriptor::redirect( task_t safeTask, bool doRedirect )
{
IOReturn err = kIOReturnSuccess;
- _IOMemoryMap * mapping = 0;
+ IOMemoryMap * mapping = 0;
OSIterator * iter;
LOCK;
do {
if( (iter = OSCollectionIterator::withCollection( _mappings))) {
- while( (mapping = (_IOMemoryMap *) iter->getNextObject()))
+
+ memory_object_t pager;
+
+ if( reserved)
+ pager = (memory_object_t) reserved->dp.devicePager;
+ else
+ pager = MACH_PORT_NULL;
+
+ while( (mapping = (IOMemoryMap *) iter->getNextObject()))
+ {
mapping->redirect( safeTask, doRedirect );
+ if (!doRedirect && !safeTask && pager && (kernel_map == mapping->fAddressMap))
+ {
+ err = populateDevicePager(pager, mapping->fAddressMap, mapping->fAddress, mapping->fOffset, mapping->fLength, kIOMapDefaultCache );
+ }
+ }
iter->release();
}
UNLOCK;
+#ifndef __LP64__
// temporary binary compatibility
IOSubMemoryDescriptor * subMem;
if( (subMem = OSDynamicCast( IOSubMemoryDescriptor, this)))
err = subMem->redirect( safeTask, doRedirect );
else
err = kIOReturnSuccess;
+#endif /* !__LP64__ */
return( err );
}
-IOReturn IOSubMemoryDescriptor::redirect( task_t safeTask, bool doRedirect )
-{
- return( _parent->redirect( safeTask, doRedirect ));
-}
-
-IOReturn _IOMemoryMap::redirect( task_t safeTask, bool doRedirect )
+IOReturn IOMemoryMap::redirect( task_t safeTask, bool doRedirect )
{
IOReturn err = kIOReturnSuccess;
if( fSuperMap) {
-// err = ((_IOMemoryMap *)superMap)->redirect( safeTask, doRedirect );
+// err = ((IOMemoryMap *)superMap)->redirect( safeTask, doRedirect );
} else {
LOCK;
&& (0 == (fOptions & kIOMapStatic)))
{
IOUnmapPages( fAddressMap, fAddress, fLength );
- if(!doRedirect && safeTask
- && (((fMemory->_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical)
- || ((fMemory->_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical64)))
- {
- IOVirtualAddress iova = (IOVirtualAddress) this;
- err = mach_vm_deallocate( fAddressMap, fAddress, fLength );
- err = fMemory->doMap( fAddressMap, &iova,
- (fOptions & ~kIOMapAnywhere) | kIOMap64Bit/*| kIOMapReserve*/,
- 0, 0 );
- } else
- err = kIOReturnSuccess;
-#ifdef DEBUG
+ err = kIOReturnSuccess;
+#if DEBUG
IOLog("IOMemoryMap::redirect(%d, %p) 0x%qx:0x%qx from %p\n", doRedirect, this, fAddress, fLength, fAddressMap);
#endif
}
return( err );
}
-IOReturn _IOMemoryMap::unmap( void )
+IOReturn IOMemoryMap::unmap( void )
{
IOReturn err;
LOCK;
if( fAddress && fAddressMap && (0 == fSuperMap) && fMemory
- && (0 == (fOptions & kIOMapStatic))) {
+ && (0 == (kIOMapStatic & fOptions))) {
err = fMemory->doUnmap(fAddressMap, (IOVirtualAddress) this, 0);
return( err );
}
-void _IOMemoryMap::taskDied( void )
+void IOMemoryMap::taskDied( void )
{
LOCK;
+ if (fUserClientUnmap) unmap();
+#if IOTRACKING
+ else IOTrackingRemoveUser(gIOMapTracking, &fTracking);
+#endif /* IOTRACKING */
+
if( fAddressMap) {
vm_map_deallocate(fAddressMap);
fAddressMap = 0;
UNLOCK;
}
+IOReturn IOMemoryMap::userClientUnmap( void )
+{
+ fUserClientUnmap = true;
+ return (kIOReturnSuccess);
+}
+
// Overload the release mechanism. All mappings must be a member
// of a memory descriptors _mappings set. This means that we
// always have 2 references on a mapping. When either of these mappings
// are released we need to free ourselves.
-void _IOMemoryMap::taggedRelease(const void *tag) const
+void IOMemoryMap::taggedRelease(const void *tag) const
{
LOCK;
super::taggedRelease(tag, 2);
UNLOCK;
}
-void _IOMemoryMap::free()
+void IOMemoryMap::free()
{
unmap();
super::free();
}
-IOByteCount _IOMemoryMap::getLength()
+IOByteCount IOMemoryMap::getLength()
{
return( fLength );
}
-IOVirtualAddress _IOMemoryMap::getVirtualAddress()
+IOVirtualAddress IOMemoryMap::getVirtualAddress()
{
+#ifndef __LP64__
if (fSuperMap)
fSuperMap->getVirtualAddress();
- else if (fAddressMap && vm_map_is_64bit(fAddressMap))
+ else if (fAddressMap
+ && vm_map_is_64bit(fAddressMap)
+ && (sizeof(IOVirtualAddress) < 8))
{
OSReportWithBacktrace("IOMemoryMap::getVirtualAddress(0x%qx) called on 64b map; use ::getAddress()", fAddress);
}
+#endif /* !__LP64__ */
return (fAddress);
}
-mach_vm_address_t _IOMemoryMap::getAddress()
+#ifndef __LP64__
+mach_vm_address_t IOMemoryMap::getAddress()
{
return( fAddress);
}
-mach_vm_size_t _IOMemoryMap::getSize()
+mach_vm_size_t IOMemoryMap::getSize()
{
return( fLength );
}
+#endif /* !__LP64__ */
-task_t _IOMemoryMap::getAddressTask()
+task_t IOMemoryMap::getAddressTask()
{
if( fSuperMap)
return( fSuperMap->getAddressTask());
return( fAddressTask);
}
-IOOptionBits _IOMemoryMap::getMapOptions()
+IOOptionBits IOMemoryMap::getMapOptions()
{
return( fOptions);
}
-IOMemoryDescriptor * _IOMemoryMap::getMemoryDescriptor()
+IOMemoryDescriptor * IOMemoryMap::getMemoryDescriptor()
{
return( fMemory );
}
-_IOMemoryMap * _IOMemoryMap::copyCompatible(
- _IOMemoryMap * newMapping )
+IOMemoryMap * IOMemoryMap::copyCompatible(
+ IOMemoryMap * newMapping )
{
task_t task = newMapping->getAddressTask();
mach_vm_address_t toAddress = newMapping->fAddress;
retain();
if( (fLength == _length) && (!_offset))
{
- newMapping->release();
newMapping = this;
}
else
{
newMapping->fSuperMap = this;
- newMapping->fOffset = _offset;
+ newMapping->fOffset = fOffset + _offset;
newMapping->fAddress = fAddress + _offset;
}
return( newMapping );
}
+IOReturn IOMemoryMap::wireRange(
+ uint32_t options,
+ mach_vm_size_t offset,
+ mach_vm_size_t length)
+{
+ IOReturn kr;
+ mach_vm_address_t start = trunc_page_64(fAddress + offset);
+ mach_vm_address_t end = round_page_64(fAddress + offset + length);
+ vm_prot_t prot;
+
+ prot = (kIODirectionOutIn & options);
+ if (prot)
+ {
+ prot |= VM_PROT_MEMORY_TAG_MAKE(fMemory->getVMTag(kernel_map));
+ kr = vm_map_wire(fAddressMap, start, end, prot, FALSE);
+ }
+ else
+ {
+ kr = vm_map_unwire(fAddressMap, start, end, FALSE);
+ }
+
+ return (kr);
+}
+
+
IOPhysicalAddress
-_IOMemoryMap::getPhysicalSegment( IOByteCount _offset, IOPhysicalLength * _length)
+#ifdef __LP64__
+IOMemoryMap::getPhysicalSegment( IOByteCount _offset, IOPhysicalLength * _length, IOOptionBits _options)
+#else /* !__LP64__ */
+IOMemoryMap::getPhysicalSegment( IOByteCount _offset, IOPhysicalLength * _length)
+#endif /* !__LP64__ */
{
IOPhysicalAddress address;
LOCK;
+#ifdef __LP64__
+ address = fMemory->getPhysicalSegment( fOffset + _offset, _length, _options );
+#else /* !__LP64__ */
address = fMemory->getPhysicalSegment( fOffset + _offset, _length );
+#endif /* !__LP64__ */
UNLOCK;
return( address );
if( 0 == gIOMemoryLock)
gIOMemoryLock = IORecursiveLockAlloc();
- IORegistryEntry::getRegistryRoot()->setProperty(kIOMaximumMappedIOByteCountKey,
- ptoa_64(gIOMaximumMappedIOPageCount), 64);
- if (!gIOCopyMapper)
- {
- IOMapper *
- mapper = new IOCopyMapper;
- if (mapper)
- {
- if (mapper->init() && mapper->start(NULL))
- gIOCopyMapper = (IOCopyMapper *) mapper;
- else
- mapper->release();
- }
- }
-
gIOLastPage = IOGetLastPageNumber();
}
void IOMemoryDescriptor::free( void )
{
- if( _mappings)
- _mappings->release();
+ if( _mappings) _mappings->release();
+ if (reserved)
+ {
+ IODelete(reserved, IOMemoryDescriptorReserved, 1);
+ reserved = NULL;
+ }
super::free();
}
0, getLength() ));
}
+#ifndef __LP64__
IOMemoryMap * IOMemoryDescriptor::map(
task_t intoTask,
IOVirtualAddress atAddress,
return (createMappingInTask(intoTask, atAddress,
options, offset, length));
}
+#endif /* !__LP64__ */
IOMemoryMap * IOMemoryDescriptor::createMappingInTask(
task_t intoTask,
mach_vm_size_t offset,
mach_vm_size_t length)
{
- IOMemoryMap * result;
- _IOMemoryMap * mapping;
+ IOMemoryMap * result;
+ IOMemoryMap * mapping;
if (0 == length)
length = getLength();
- mapping = new _IOMemoryMap;
+ mapping = new IOMemoryMap;
if( mapping
&& !mapping->init( intoTask, atAddress,
else
result = 0;
-#ifdef DEBUG
+#if DEBUG
if (!result)
- IOLog("createMappingInTask failed desc %p, addr %qx, options %lx, offset %qx, length %qx\n",
- this, atAddress, options, offset, length);
+ IOLog("createMappingInTask failed desc %p, addr %qx, options %x, offset %qx, length %llx\n",
+ this, atAddress, (uint32_t) options, offset, length);
#endif
return (result);
}
-IOReturn _IOMemoryMap::redirect(IOMemoryDescriptor * newBackingMemory,
+#ifndef __LP64__ // there is only a 64 bit version for LP64
+IOReturn IOMemoryMap::redirect(IOMemoryDescriptor * newBackingMemory,
IOOptionBits options,
IOByteCount offset)
{
return (redirect(newBackingMemory, options, (mach_vm_size_t)offset));
}
+#endif
-IOReturn _IOMemoryMap::redirect(IOMemoryDescriptor * newBackingMemory,
+IOReturn IOMemoryMap::redirect(IOMemoryDescriptor * newBackingMemory,
IOOptionBits options,
mach_vm_size_t offset)
{
physMem->retain();
}
- if (!fRedirUPL)
+ if (!fRedirUPL && fMemory->_memRef && (1 == fMemory->_memRef->count))
{
- vm_size_t size = fLength;
- int flags = UPL_COPYOUT_FROM | UPL_SET_INTERNAL
- | UPL_SET_LITE | UPL_SET_IO_WIRE | UPL_BLOCK_ACCESS;
- if (KERN_SUCCESS != memory_object_iopl_request((ipc_port_t) fMemory->_memEntry, 0, &size, &fRedirUPL,
+ upl_size_t size = round_page(fLength);
+ upl_control_flags_t flags = UPL_COPYOUT_FROM | UPL_SET_INTERNAL
+ | UPL_SET_LITE | UPL_SET_IO_WIRE | UPL_BLOCK_ACCESS
+ | UPL_MEMORY_TAG_MAKE(fMemory->getVMTag(kernel_map));
+ if (KERN_SUCCESS != memory_object_iopl_request(fMemory->_memRef->entries[0].entry, 0, &size, &fRedirUPL,
NULL, NULL,
&flags))
fRedirUPL = 0;
if (physMem)
{
IOUnmapPages( fAddressMap, fAddress, fLength );
- physMem->redirect(0, true);
+ if ((false))
+ physMem->redirect(0, true);
}
}
upl_deallocate(fRedirUPL);
fRedirUPL = 0;
}
- if (physMem)
+ if ((false) && physMem)
physMem->redirect(0, false);
}
}
IOByteCount __offset,
IOByteCount __length )
{
+#ifndef __LP64__
if (!(kIOMap64Bit & options)) panic("IOMemoryDescriptor::makeMapping !64bit");
+#endif /* !__LP64__ */
IOMemoryDescriptor * mapDesc = 0;
- _IOMemoryMap * result = 0;
+ IOMemoryMap * result = 0;
OSIterator * iter;
- _IOMemoryMap * mapping = (_IOMemoryMap *) __address;
+ IOMemoryMap * mapping = (IOMemoryMap *) __address;
mach_vm_size_t offset = mapping->fOffset + __offset;
mach_vm_size_t length = mapping->fLength;
if (kIOMapUnique & options)
{
- IOPhysicalAddress phys;
+ addr64_t phys;
IOByteCount physLen;
// if (owner != this) continue;
if (((_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical)
|| ((_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical64))
{
- phys = getPhysicalSegment(offset, &physLen);
+ phys = getPhysicalSegment(offset, &physLen, kIOMemoryMapperNone);
if (!phys || (physLen < length))
continue;
- mapDesc = IOMemoryDescriptor::withPhysicalAddress(
- phys, length, _direction);
+ mapDesc = IOMemoryDescriptor::withAddressRange(
+ phys, length, getDirection() | kIOMemoryMapperNone, NULL);
if (!mapDesc)
continue;
offset = 0;
// look for a compatible existing mapping
if( (iter = OSCollectionIterator::withCollection(_mappings)))
{
- _IOMemoryMap * lookMapping;
- while ((lookMapping = (_IOMemoryMap *) iter->getNextObject()))
+ IOMemoryMap * lookMapping;
+ while ((lookMapping = (IOMemoryMap *) iter->getNextObject()))
{
if ((result = lookMapping->copyCompatible(mapping)))
{
iter->release();
}
if (result || (options & kIOMapReference))
+ {
+ if (result != mapping)
+ {
+ mapping->release();
+ mapping = NULL;
+ }
continue;
+ }
}
if (!mapDesc)
_mappings->removeObject( mapping);
}
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-
-#undef super
-#define super IOMemoryDescriptor
-
-OSDefineMetaClassAndStructors(IOSubMemoryDescriptor, IOMemoryDescriptor)
-
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-
-bool IOSubMemoryDescriptor::initSubRange( IOMemoryDescriptor * parent,
- IOByteCount offset, IOByteCount length,
- IODirection direction )
-{
- if( !parent)
- return( false);
-
- if( (offset + length) > parent->getLength())
- return( false);
-
- /*
- * We can check the _parent instance variable before having ever set it
- * to an initial value because I/O Kit guarantees that all our instance
- * variables are zeroed on an object's allocation.
- */
-
- if( !_parent) {
- if( !super::init())
- return( false );
- } else {
- /*
- * An existing memory descriptor is being retargeted to
- * point to somewhere else. Clean up our present state.
- */
-
- _parent->release();
- _parent = 0;
- }
-
- parent->retain();
- _parent = parent;
- _start = offset;
- _length = length;
- _direction = direction;
- _tag = parent->getTag();
-
- return( true );
-}
-
-void IOSubMemoryDescriptor::free( void )
-{
- if( _parent)
- _parent->release();
-
- super::free();
-}
-
-
-IOReturn
-IOSubMemoryDescriptor::dmaCommandOperation(DMACommandOps op, void *vData, UInt dataSize) const
-{
- IOReturn rtn;
-
- if (kIOMDGetCharacteristics == op) {
-
- rtn = _parent->dmaCommandOperation(op, vData, dataSize);
- if (kIOReturnSuccess == rtn) {
- IOMDDMACharacteristics *data = (IOMDDMACharacteristics *) vData;
- data->fLength = _length;
- data->fSGCount = 0; // XXX gvdl: need to compute and pages
- data->fPages = 0;
- data->fPageAlign = 0;
- }
-
- return rtn;
- }
- else if (kIOMDWalkSegments & op) {
- if (dataSize < sizeof(IOMDDMAWalkSegmentArgs))
- return kIOReturnUnderrun;
-
- IOMDDMAWalkSegmentArgs *data =
- reinterpret_cast<IOMDDMAWalkSegmentArgs *>(vData);
- UInt offset = data->fOffset;
- UInt remain = _length - offset;
- if ((int) remain <= 0)
- return (!remain)? kIOReturnOverrun : kIOReturnInternalError;
-
- data->fOffset = offset + _start;
- rtn = _parent->dmaCommandOperation(op, vData, dataSize);
- if (data->fLength > remain)
- data->fLength = remain;
- data->fOffset = offset;
-
- return rtn;
- }
- else
- return kIOReturnBadArgument;
-}
-
-addr64_t
-IOSubMemoryDescriptor::getPhysicalSegment64(IOByteCount offset, IOByteCount * length)
-{
- addr64_t address;
- IOByteCount actualLength;
-
- assert(offset <= _length);
-
- if( length)
- *length = 0;
-
- if( offset >= _length)
- return( 0 );
-
- address = _parent->getPhysicalSegment64( offset + _start, &actualLength );
-
- if( address && length)
- *length = min( _length - offset, actualLength );
-
- return( address );
-}
-
-IOPhysicalAddress
-IOSubMemoryDescriptor::getPhysicalSegment( IOByteCount offset, IOByteCount * length )
-{
- IOPhysicalAddress address;
- IOByteCount actualLength;
-
- assert(offset <= _length);
-
- if( length)
- *length = 0;
-
- if( offset >= _length)
- return( 0 );
-
- address = _parent->getPhysicalSegment( offset + _start, &actualLength );
-
- if( address && length)
- *length = min( _length - offset, actualLength );
-
- return( address );
-}
-
-IOPhysicalAddress
-IOSubMemoryDescriptor::getSourceSegment( IOByteCount offset, IOByteCount * length )
-{
- IOPhysicalAddress address;
- IOByteCount actualLength;
-
- assert(offset <= _length);
-
- if( length)
- *length = 0;
-
- if( offset >= _length)
- return( 0 );
-
- address = _parent->getSourceSegment( offset + _start, &actualLength );
-
- if( address && length)
- *length = min( _length - offset, actualLength );
-
- return( address );
-}
-
-void * IOSubMemoryDescriptor::getVirtualSegment(IOByteCount offset,
- IOByteCount * lengthOfSegment)
-{
- return( 0 );
-}
-
-IOReturn IOSubMemoryDescriptor::doMap(
- vm_map_t addressMap,
- IOVirtualAddress * atAddress,
- IOOptionBits options,
- IOByteCount sourceOffset,
- IOByteCount length )
-{
- panic("IOSubMemoryDescriptor::doMap");
- return (IOMemoryDescriptor::doMap(addressMap, atAddress, options, sourceOffset, length));
-}
-
-IOByteCount IOSubMemoryDescriptor::readBytes(IOByteCount offset,
- void * bytes, IOByteCount length)
-{
- IOByteCount byteCount;
-
- assert(offset <= _length);
-
- if( offset >= _length)
- return( 0 );
-
- LOCK;
- byteCount = _parent->readBytes( _start + offset, bytes,
- min(length, _length - offset) );
- UNLOCK;
-
- return( byteCount );
-}
-
-IOByteCount IOSubMemoryDescriptor::writeBytes(IOByteCount offset,
- const void* bytes, IOByteCount length)
-{
- IOByteCount byteCount;
-
- assert(offset <= _length);
-
- if( offset >= _length)
- return( 0 );
-
- LOCK;
- byteCount = _parent->writeBytes( _start + offset, bytes,
- min(length, _length - offset) );
- UNLOCK;
-
- return( byteCount );
-}
-
-IOReturn IOSubMemoryDescriptor::setPurgeable( IOOptionBits newState,
- IOOptionBits * oldState )
-{
- IOReturn err;
-
- LOCK;
- err = _parent->setPurgeable( newState, oldState );
- UNLOCK;
-
- return( err );
-}
-
-IOReturn IOSubMemoryDescriptor::performOperation( IOOptionBits options,
- IOByteCount offset, IOByteCount length )
-{
- IOReturn err;
-
- assert(offset <= _length);
-
- if( offset >= _length)
- return( kIOReturnOverrun );
-
- LOCK;
- err = _parent->performOperation( options, _start + offset,
- min(length, _length - offset) );
- UNLOCK;
-
- return( err );
-}
-
-IOReturn IOSubMemoryDescriptor::prepare(
- IODirection forDirection)
-{
- IOReturn err;
-
- LOCK;
- err = _parent->prepare( forDirection);
- UNLOCK;
-
- return( err );
-}
-
-IOReturn IOSubMemoryDescriptor::complete(
- IODirection forDirection)
-{
- IOReturn err;
-
- LOCK;
- err = _parent->complete( forDirection);
- UNLOCK;
-
- return( err );
-}
-
-IOMemoryMap * IOSubMemoryDescriptor::makeMapping(
- IOMemoryDescriptor * owner,
- task_t intoTask,
- IOVirtualAddress address,
- IOOptionBits options,
- IOByteCount offset,
- IOByteCount length )
-{
- IOMemoryMap * mapping = 0;
-
- if (!(kIOMap64Bit & options))
- {
- panic("IOSubMemoryDescriptor::makeMapping !64bit");
- }
-
- mapping = (IOMemoryMap *) _parent->makeMapping(
- owner,
- intoTask,
- address,
- options, _start + offset, length );
-
- return( mapping );
-}
-
-/* ick */
-
+#ifndef __LP64__
+// obsolete initializers
+// - initWithOptions is the designated initializer
bool
-IOSubMemoryDescriptor::initWithAddress(void * address,
+IOMemoryDescriptor::initWithAddress(void * address,
IOByteCount length,
IODirection direction)
{
}
bool
-IOSubMemoryDescriptor::initWithAddress(vm_address_t address,
+IOMemoryDescriptor::initWithAddress(IOVirtualAddress address,
IOByteCount length,
IODirection direction,
task_t task)
}
bool
-IOSubMemoryDescriptor::initWithPhysicalAddress(
+IOMemoryDescriptor::initWithPhysicalAddress(
IOPhysicalAddress address,
IOByteCount length,
IODirection direction )
}
bool
-IOSubMemoryDescriptor::initWithRanges(
+IOMemoryDescriptor::initWithRanges(
IOVirtualRange * ranges,
UInt32 withCount,
IODirection direction,
}
bool
-IOSubMemoryDescriptor::initWithPhysicalRanges( IOPhysicalRange * ranges,
+IOMemoryDescriptor::initWithPhysicalRanges( IOPhysicalRange * ranges,
UInt32 withCount,
IODirection direction,
bool asReference)
return( false );
}
+void * IOMemoryDescriptor::getVirtualSegment(IOByteCount offset,
+ IOByteCount * lengthOfSegment)
+{
+ return( 0 );
+}
+#endif /* !__LP64__ */
+
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
bool IOGeneralMemoryDescriptor::serialize(OSSerialize * s) const
{
OSSymbol const *keys[2];
OSObject *values[2];
+ OSArray * array;
+
struct SerData {
user_addr_t address;
user_size_t length;
IOOptionBits type = _flags & kIOMemoryTypeMask;
if (s == NULL) return false;
- if (s->previouslySerialized(this)) return true;
- // Pretend we are an array.
- if (!s->addXMLStartTag(this, "array")) return false;
+ array = OSArray::withCapacity(4);
+ if (!array) return (false);
nRanges = _rangesCount;
vcopy = (SerData *) IOMalloc(sizeof(SerData) * nRanges);
if (nRanges == _rangesCount) {
Ranges vec = _ranges;
for (index = 0; index < nRanges; index++) {
- user_addr_t addr; IOByteCount len;
+ mach_vm_address_t addr; mach_vm_size_t len;
getAddrLenForInd(addr, len, type, vec, index);
vcopy[index].address = addr;
vcopy[index].length = len;
{
user_addr_t addr = vcopy[index].address;
IOByteCount len = (IOByteCount) vcopy[index].length;
- values[0] =
- OSNumber::withNumber(addr, (((UInt64) addr) >> 32)? 64 : 32);
+ values[0] = OSNumber::withNumber(addr, sizeof(addr) * 8);
if (values[0] == 0) {
result = false;
goto bail;
result = false;
goto bail;
}
+ array->setObject(dict);
+ dict->release();
values[0]->release();
values[1]->release();
values[0] = values[1] = 0;
-
- result = dict->serialize(s);
- dict->release();
- if (!result) {
- goto bail;
- }
}
- result = s->addXMLEndTag("array");
+
+ result = array->serialize(s);
bail:
+ if (array)
+ array->release();
if (values[0])
values[0]->release();
if (values[1])
keys[1]->release();
if (vcopy)
IOFree(vcopy, sizeof(SerData) * nRanges);
- return result;
-}
-
-bool IOSubMemoryDescriptor::serialize(OSSerialize * s) const
-{
- if (!s) {
- return (false);
- }
- if (s->previouslySerialized(this)) return true;
-
- // Pretend we are a dictionary.
- // We must duplicate the functionality of OSDictionary here
- // because otherwise object references will not work;
- // they are based on the value of the object passed to
- // previouslySerialized and addXMLStartTag.
-
- if (!s->addXMLStartTag(this, "dict")) return false;
-
- char const *keys[3] = {"offset", "length", "parent"};
-
- OSObject *values[3];
- values[0] = OSNumber::withNumber(_start, sizeof(_start) * 8);
- if (values[0] == 0)
- return false;
- values[1] = OSNumber::withNumber(_length, sizeof(_length) * 8);
- if (values[1] == 0) {
- values[0]->release();
- return false;
- }
- values[2] = _parent;
-
- bool result = true;
- for (int i=0; i<3; i++) {
- if (!s->addString("<key>") ||
- !s->addString(keys[i]) ||
- !s->addXMLEndTag("key") ||
- !values[i]->serialize(s)) {
- result = false;
- break;
- }
- }
- values[0]->release();
- values[1]->release();
- if (!result) {
- return false;
- }
- return s->addXMLEndTag("dict");
+ return result;
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
OSMetaClassDefineReservedUsed(IOMemoryDescriptor, 0);
+#ifdef __LP64__
+OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 1);
+OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 2);
+OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 3);
+OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 4);
+OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 5);
+OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 6);
+OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 7);
+#else /* !__LP64__ */
OSMetaClassDefineReservedUsed(IOMemoryDescriptor, 1);
OSMetaClassDefineReservedUsed(IOMemoryDescriptor, 2);
OSMetaClassDefineReservedUsed(IOMemoryDescriptor, 3);
OSMetaClassDefineReservedUsed(IOMemoryDescriptor, 4);
OSMetaClassDefineReservedUsed(IOMemoryDescriptor, 5);
-OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 6);
-OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 7);
+OSMetaClassDefineReservedUsed(IOMemoryDescriptor, 6);
+OSMetaClassDefineReservedUsed(IOMemoryDescriptor, 7);
+#endif /* !__LP64__ */
OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 8);
OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 9);
OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 10);
IOPhysicalAddress
IOMemoryDescriptor::getPhysicalAddress()
{ return( getPhysicalSegment( 0, 0 )); }
-
-
-
projects / apple / xnu.git / blobdiff